How to Write an Annotated Bibliography: Complete Guide With Examples (2026)
Learn how to write an annotated bibliography in APA, MLA, and Chicago formats. Includes annotation examples, templates, and tips for descriptive, evaluative, and summary annotations.
An annotated bibliography is a list of citations with a brief paragraph (100-200 words) evaluating each source. Three types: descriptive (what), evaluative (how good), and combination. APA and MLA use hanging indent + annotation indented below. Always include: summary of main argument, evaluation of credibility, and relevance to your research.
How to Write an Annotated Bibliography: Complete Guide With Examples
TL;DR: An annotated bibliography = citation + 100-200 word paragraph per source. Three types: descriptive (summarize), evaluative (critique), combination (both). Use the same citation format as your paper (APA, MLA, etc.) and add the annotation as an indented paragraph below.
An annotated bibliography forces you to actually read and think about your sources — which is exactly why professors assign them. It's not just a list of citations; it's a tool for developing your understanding of the literature before writing a paper.
This guide shows you how to write annotated bibliographies in APA, MLA, and Chicago formats, with templates and real examples.
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Frequently Asked Questions
- What is an annotated bibliography?
- An annotated bibliography is a list of citations (books, articles, websites) with a brief paragraph (100-200 words) after each one. The paragraph summarizes the source, evaluates its quality, and explains its relevance to your research. It's different from a regular bibliography, which only lists citations without commentary.
- How long should each annotation be?
- Most assignments require 100-200 words per annotation (about 4-7 sentences). Some professors specify 150 words, others allow up to 300. Check your assignment guidelines. A typical annotation has 2-3 sentences of summary, 1-2 sentences of evaluation, and 1-2 sentences on relevance.
- What is the difference between a bibliography and an annotated bibliography?
- A bibliography (or Works Cited/References) is a list of sources with standard citation information only. An annotated bibliography adds a paragraph after each citation that summarizes, evaluates, and explains the relevance of each source. Think of it as a bibliography with commentary.
- What are the three types of annotations?
- 1) Descriptive/Summary: Summarizes the source's content without evaluation. 2) Evaluative/Critical: Assesses the source's quality, reliability, and bias. 3) Combination: Both summarizes and evaluates (most common assignment type). Your professor's instructions determine which type to use.
- Do I need to read the entire source for an annotated bibliography?
- You should read enough to understand the main argument, methods, and conclusions. For journal articles: read the abstract, introduction, and conclusion at minimum. For books: read the introduction, table of contents, conclusion, and relevant chapters. Skimming is acceptable if you capture the main ideas accurately.
- Should an annotated bibliography be in alphabetical order?
- Yes — in most formats (APA, MLA, Chicago), entries are listed alphabetically by the first author's last name, just like a regular reference list or Works Cited page. Some assignments may request chronological or thematic organization instead.