A literature review is a structured written synthesis of the published research on a specific topic that critically evaluates the prior work, identifies the patterns convergence and disagreement across the cited sources, and positions the writer's own contribution within the disciplinary conversation. EssayFount's literature review format hub gives the canonical structure for the narrative review the systematic review the scoping review and the integrative review, the thematic synthesis approach used in the social and health sciences, the search strategy documentation expected in the systematic review, the Preferred Reporting Items for Systematic Reviews and Meta-Analyses reporting framework, and annotated examples across the dissertation chapter the journal manuscript and the standalone undergraduate review essay, all written by credentialed academic writers.
Authored by Dr. Henry Whitfield, PhD Comparative Literature and Writing Studies, Humanities Editorial Lead. Peer-reviewed by Dr. Clara Bennett, PhD Behavioral and Social Sciences, Social Sciences and Business Editorial Lead. Last reviewed April 2026.
How students use the EssayFount literature review hub
In the last twelve months, seventy-three verified credentialed academic writers holding a PhD or terminal degree across the humanities the social sciences the health sciences and the natural sciences contributed to this hub. They drafted one hundred sixty-eight annotated literature review examples across the canonical undergraduate graduate and doctoral review formats, ninety-two thematic synthesis worked examples and forty-seven systematic review search strategy templates. Traffic peaks at the same three windows every term: Sunday evening before a Monday assignment deadline, the four weeks leading into thesis and dissertation defense season in late March and early April and again in late October and early November, and the second week of every term when first-year graduate students are still calibrating instructor expectations for the new course.
Every example passes a two-tier editorial review. A subject-credentialed writer drafts the review against the source rubric and the relevant disciplinary reporting framework; a second senior writer verifies the search strategy documentation the citation accuracy the synthesis quality and the citation style consistency before publication. The approach mirrors the Cochrane Handbook for Systematic Reviews of Interventions guidance for the systematic review category and the Booth Sutton and Papaioannou Systematic Approaches to a Successful Literature Review text for the broader review typology. Read more about our writers homework help and the credential verification process behind every byline.
The hub works as a reference library, not a shortcut. Students should formulate the research question search the relevant databases screen the retrieved studies and synthesize the findings in their own voice. When the synthesis structure breaks down or the search strategy feels incomplete, the annotated example shows exactly what a graded A-range literature review looks like in context. For related writing skills, see our annotated bibliography format guide homework help, lab report format guide research papers, discussion post format guide paper assistance, and case study format guide study materials. For citation-specific help, see our citation styles hub essay examples. For a fully written model literature review with synthesis tables, see our advanced dissertation writing service writing services.
Literature review typology: narrative, systematic, scoping and integrative
The literature review typology distinguishes the four canonical categories used in the contemporary academic writing landscape. The narrative literature review also called the traditional review or the critical review provides the broad qualitative synthesis of the published literature on a topic, with the inclusion criteria the search strategy and the synthesis approach often left implicit and dependent on the writer's expertise. The narrative review remains the dominant form in the humanities the law and the upper-undergraduate research paper context, and serves as the introductory chapter or section of most empirical research papers and dissertations across all disciplines. The narrative review supports the research positioning the conceptual framework development and the gap identification that motivates the empirical work.
The systematic literature review applies the explicit reproducible methodology to identify appraise and synthesize all the relevant studies on a focused research question, with the canonical reporting framework the Preferred Reporting Items for Systematic Reviews and Meta-Analyses applied across the health sciences the social sciences and increasingly other disciplines. The systematic review documents the search strategy the inclusion and exclusion criteria the screening process the quality appraisal and the synthesis approach in enough detail that an independent reviewer could reproduce the work. The systematic review supports the evidence-based practice the policy recommendation and the meta-analytic quantitative synthesis when the included studies report sufficient quantitative data.
The scoping literature review maps the breadth of the published literature on a broad topic without the focused research question of the systematic review, identifying the key concepts the evidence types the research gaps and the conceptual boundaries of the literature. The scoping review uses the Arksey and O'Malley framework or the updated Joanna Briggs Institute framework with the canonical five-stage process: identify the research question, identify the relevant studies, select the studies, chart the data, and collate summarize and report the results. The scoping review supports the broad research agenda development the systematic review feasibility assessment and the evidence map for the new or rapidly evolving research area.
The integrative literature review combines the empirical and theoretical literature on a topic with the explicit synthesis methodology, often used in the nursing the management and the education research traditions. The Whittemore and Knafl five-stage integrative review framework provides the canonical methodology with the problem identification the literature search the data evaluation the data analysis and the presentation phases. The integrative review supports the theory development the conceptual framework refinement and the practice recommendation in fields where the relevant literature spans the empirical quantitative the empirical qualitative and the theoretical traditions.
Research question formulation and the PICO framework
The research question is the foundation of the literature review with the canonical question formulation framework varying by review type and discipline. The PICO framework Patient Intervention Comparison Outcome dominates the health sciences systematic review tradition, with the canonical extensions including the PICOS adding Study design, the PICOC adding Context, the PICOT adding Time, the SPICE adding Setting Perspective Phenomenon Comparison Evaluation for qualitative reviews, and the SPIDER adding Sample Phenomenon of Interest Design Evaluation Research type also for qualitative reviews. The framework forces the explicit articulation of each question component and supports the systematic database search strategy construction.
The CIMO framework Context Intervention Mechanism Outcome dominates the management and organizational research review tradition with the explicit attention to the mechanism component that the PICO framework does not surface. The BeHEMoTh framework Behavior Health context Exclusions Models or Theories dominates the behavior change theory review. The narrative review and the scoping review often use the broader question formulation that does not require the structured framework, and the integrative review can use either the structured or the broader question formulation depending on the substantive focus.
Search strategy and database selection
The systematic search strategy uses the documented database selection the controlled vocabulary search the keyword search the citation chaining and the gray literature search to identify the relevant studies. The database selection follows the disciplinary convention with the canonical databases including PubMed and the Cochrane Central Register of Controlled Trials for the health sciences, PsycINFO and the Education Resources Information Center database for the social and behavioral sciences, the Cumulative Index to Nursing and Allied Health Literature for nursing, the Web of Science and Scopus for the cross-disciplinary citation searching, the Modern Language Association International Bibliography for the humanities, and the EconLit and the Business Source Complete for the business and economics disciplines. The systematic review typically searches at least three databases with the search strategy documented for each.
The controlled vocabulary search uses the database thesaurus terms such as the Medical Subject Headings in PubMed and the PsycINFO Thesaurus terms in PsycINFO to capture the variation in author terminology across the published literature. The keyword search uses the natural language terms with the Boolean operators AND OR NOT and the proximity operators to combine the concept blocks. The citation chaining uses the backward citation tracing through the reference lists of the included studies and the forward citation tracing through the citing studies to identify the additional relevant work. The gray literature search includes the dissertation databases the conference proceedings the policy reports and the trial registries to capture the studies not indexed in the traditional bibliographic databases.
Screening, study selection and inclusion criteria
The screening process operationalizes the inclusion and exclusion criteria across the title and abstract screening stage and the full text screening stage with the canonical workflow using the Covidence the Rayyan or the EndNote software for the reference management and the dual independent reviewer screening to minimize the selection bias. The inclusion criteria specify the population the intervention the comparison the outcome the study design the publication date range the language and the publication type that qualify the study for inclusion. The exclusion criteria specify the disqualifying characteristics that exclude the study from the review with the canonical examples including the editorial commentary the conference abstract without full paper the duplicate publication and the study with insufficient data for the synthesis.
The screening documentation supports the Preferred Reporting Items for Systematic Reviews and Meta-Analyses flow diagram that reports the number of records identified through database searching, the number identified through other sources, the number after duplicate removal, the number screened at title and abstract, the number assessed at full text, the number excluded at full text with reasons, and the number included in the qualitative and quantitative synthesis. The flow diagram is the canonical visual element of the systematic review methods section.
Quality appraisal and risk of bias assessment
The quality appraisal of the included studies uses the discipline-appropriate critical appraisal tool with the canonical examples including the Cochrane Risk of Bias 2 tool for the randomized controlled trial, the Risk of Bias in Non-randomized Studies of Interventions tool for the nonrandomized comparative study, the Critical Appraisal Skills Programme checklists for the qualitative study the cohort study the case-control study and the diagnostic accuracy study, the Joanna Briggs Institute critical appraisal checklists for the broader study type catalog, and the Quality Assessment Tool for Quantitative Studies of the Effective Public Health Practice Project for the public health intervention review. The GRADE framework Grading of Recommendations Assessment Development and Evaluation provides the canonical evidence quality rating across the body of evidence rather than the individual study, with the four-level evidence quality rating high moderate low and very low and the four-level recommendation strength rating strong for, conditional for, conditional against, and strong against.
The risk of bias assessment supports the synthesis interpretation by indicating the confidence the reader can place in the included study findings. The studies with high risk of bias receive less weight in the qualitative synthesis and may be excluded from the quantitative meta-analysis through the sensitivity analysis. The risk of bias visualization typically uses the Cochrane traffic light plot showing the green amber and red rating across the bias domains for each included study, with the summary risk of bias percentage across the body of evidence reported in the synthesis section.
Synthesis approaches: thematic, narrative and meta-analytic
The synthesis approach selection depends on the included study type and the review research question. The thematic synthesis developed by Thomas and Harden provides the canonical qualitative synthesis approach with the line-by-line coding the descriptive theme development and the analytical theme generation across the included qualitative studies, used widely in the health sciences and the social sciences qualitative review. The meta-ethnography developed by Noblit and Hare provides the alternative qualitative synthesis approach with the reciprocal translation the refutational translation and the line-of-argument synthesis, used widely in the nursing and the education research review. The framework synthesis applies the predefined conceptual framework to the included study data and is well suited to the policy-relevant review with the existing framework.
The narrative synthesis developed by Popay and colleagues provides the systematic narrative summary of the included study findings with the textual descriptions the groupings the tabulations the transformation of the evidence and the exploration of the relationships within and between the studies. The meta-analysis applies the quantitative statistical synthesis to the included study effect sizes with the canonical methods including the fixed effect and the random effects models the heterogeneity assessment using the Q statistic and the I-squared statistic the publication bias assessment using the funnel plot and the Egger test and the subgroup analysis and the meta-regression for the effect modifier exploration. The Cochrane Review Manager software the R metafor package and the Stata meta module provide the canonical software for the meta-analytic synthesis.
Review structure: introduction, body and conclusion
The standalone literature review essay typically follows the three section structure with the introduction the body and the conclusion. The introduction establishes the research question the rationale for the review the scope and the structure of the body sections that follow. The body organizes the synthesis by the thematic the chronological the methodological or the theoretical structure depending on the review type and the disciplinary convention. The conclusion summarizes the principal synthesis findings the implications for the discipline and the identified research gaps that motivate the future work.
The thematic structure organizes the body sections around the major themes that emerged from the synthesis with the canonical convention of three to five themes for the undergraduate review and five to ten themes for the graduate or dissertation chapter review. The chronological structure organizes the body sections around the temporal evolution of the research literature with the canonical convention of distinguishing the foundational the developmental and the contemporary phases of the literature. The methodological structure organizes the body sections around the methodological approaches used in the included studies with the canonical convention of separating the qualitative the quantitative and the mixed methods studies. The theoretical structure organizes the body sections around the competing or complementary theoretical frameworks present in the literature with the canonical convention of dedicating one body section to each major theoretical framework.
Dissertation literature review chapter
The dissertation literature review chapter typically runs sixty to one hundred twenty pages depending on the discipline and the institution requirement, with the canonical structure including the introduction the conceptual framework section the major thematic sections the gap identification section and the chapter summary. The conceptual framework section presents the theoretical lens through which the candidate analyzes the literature, often integrating multiple theories into a synthesized framework specific to the dissertation research question. The major thematic sections present the systematic review of the relevant literature organized by the themes that align with the research questions and the conceptual framework. The gap identification section articulates the specific research gap the dissertation will address with the explicit connection to the empirical chapters that follow.
The dissertation literature review chapter integrates the systematic search strategy documentation the screening flow diagram the quality appraisal results and the synthesis tables that the standalone systematic review would publish in the methods and results sections. The reviewer expectation is that the dissertation literature review demonstrates the comprehensive command of the relevant literature the critical evaluation of the methodological quality of the prior work the synthesis of the findings into a coherent picture and the explicit positioning of the dissertation research within the literature gap. For deeper coverage of dissertation chapter writing see the advanced dissertation writing service paper assistance.
Annotated literature review example: psychology
The annotated psychology literature review example on this page covers the topic of cognitive behavioral therapy for adolescent depression, a canonical example for the narrative review at the upper-undergraduate level and the systematic review at the graduate level. The annotated example walks the introduction with the depression epidemiology in adolescence the cognitive behavioral therapy theoretical framework and the rationale for the focused review of the adolescent population; the methods section with the database selection PsycINFO and PubMed the search string with the controlled vocabulary terms and the keyword expansion the inclusion and exclusion criteria and the dual independent screening process; the results with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses flow diagram showing twenty-seven included studies from three hundred forty-two screened the study characteristics table the risk of bias summary using the Cochrane Risk of Bias 2 tool and the synthesis organized by the four major themes; the discussion with the synthesis interpretation the comparison with the prior reviews the limitations of the included evidence base and the implications for clinical practice; and the conclusion with the principal finding statement and the future research recommendations.
Annotation: the example demonstrates the canonical seven-section systematic review with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses flow diagram the study characteristics table the risk of bias visualization the four-theme synthesis organization and the discussion integrating the synthesis findings with the prior review literature the included evidence quality and the clinical practice implications. For deeper coverage of psychology literature see the psychology pillar academic resources.
Annotated literature review example: nursing
The annotated nursing literature review example on this page covers the topic of pressure injury prevention in the intensive care unit population, a canonical example for the integrative review using the Whittemore and Knafl five-stage framework. The annotated example walks the problem identification with the pressure injury epidemiology in the intensive care unit and the clinical practice question; the literature search with the database selection the search strategy documentation and the screening process; the data evaluation with the quality appraisal using the Joanna Briggs Institute critical appraisal checklists across the included quantitative qualitative and mixed methods studies; the data analysis with the constant comparison method generating the analytical themes; and the presentation with the integrated synthesis the practice implications and the future research recommendations.
Annotation: the example demonstrates the canonical integrative review with the explicit Whittemore and Knafl framework application the multi-method evidence integration the Joanna Briggs Institute quality appraisal across study types the constant comparison thematic synthesis and the explicit translation of the synthesis findings into the practice recommendations. For deeper coverage of nursing literature see the nursing pillar essay examples.
Annotated literature review example: education
The annotated education literature review example on this page covers the topic of culturally responsive pedagogy in elementary mathematics instruction, a canonical example for the scoping review using the Arksey and O'Malley framework. The annotated example walks the research question identification with the broad mapping question and the conceptual scope; the relevant studies identification with the database selection the search strategy and the gray literature search across dissertation databases and policy reports; the study selection with the inclusion criteria emphasizing the breadth over the focused depth and the iterative selection process; the data charting with the descriptive variables the conceptual mapping and the methodological approach extraction; and the collation summarization and reporting with the evidence map the conceptual framework and the research gap identification.
Annotation: the example demonstrates the canonical scoping review with the explicit Arksey and O'Malley framework application the broader question scope the gray literature inclusion the iterative selection process the descriptive data charting and the evidence map visualization that summarizes the literature breadth without the focused systematic review depth. For deeper coverage of education literature see the education pillar study materials.
Citation styles for literature reviews
The citation style selection follows the disciplinary convention with the American Psychological Association seventh edition style dominant in the social and behavioral sciences and increasingly the nursing and the education disciplines, the Modern Language Association ninth edition style dominant in the humanities particularly literature and language studies, the Chicago Manual of Style seventeenth edition with the author-date variant common in the social sciences and history and the notes-bibliography variant common in the humanities, the American Medical Association eleventh edition style and the Vancouver style dominant in the medical and biomedical disciplines, and the Council of Science Editors style dominant in the natural sciences. The citation style consistency across the in-text citations and the reference list is non-negotiable; the reference manager software including Zotero EndNote Mendeley or RefWorks supports the consistent citation formatting and the easy style switching across the manuscript drafts. For comprehensive citation style guidance see the expert citation styles hub support.
Common literature review mistakes and how to avoid them
The most common literature review mistakes include the descriptive summary instead of the critical synthesis the chronological listing of source-by-source paragraphs instead of the thematic integration the absence of the explicit research question the inadequate search strategy documentation the failure to acknowledge the methodological quality of the included evidence the absence of the synthesis tables that integrate the included study findings the inconsistent citation style the heavy reliance on the secondary sources instead of the primary research literature and the failure to position the writer's own contribution within the literature gap. The annotated examples on this hub show explicitly how to avoid each of these mistakes through the structural and stylistic choices that distinguish the publishable literature review from the pedestrian source summary.
The descriptive summary problem manifests in the literature review that recounts what each source said without the analytical evaluation of how the sources relate to each other and what they collectively reveal about the research question. The remedy is the explicit comparison and contrast across sources the identification of the methodological and conceptual patterns and the synthesis statement that integrates the source findings into the writer's analytical framework. The chronological listing problem manifests in the source-by-source paragraph structure that reads as the bibliography expanded into prose; the remedy is the thematic structure that organizes the body sections by the synthesis themes with the multiple sources cited within each thematic section.
Literature review templates and download
Download the full editable literature review template, including the narrative systematic scoping and integrative review subject-specific adaptations, the Preferred Reporting Items for Systematic Reviews and Meta-Analyses flow diagram template, the search strategy documentation template, the inclusion and exclusion criteria template, the study characteristics extraction template, the quality appraisal summary template, and the synthesis matrix templates, from the EssayFount free templates library. For annotated subject samples see the literature review examples on the essay samples library writing guide. For related format templates browse the full format library and the related annotated bibliography format guide academic resources.
Literature review writing service
Need a credentialed academic writer to draft a narrative systematic scoping or integrative literature review with full search strategy documentation Preferred Reporting Items for Systematic Reviews and Meta-Analyses reporting and discipline-appropriate synthesis tables? Send the research question the rubric and any reference list and receive a verified-writer quote within the hour. Start a literature review quote.