How to write an annotated bibliography

A citation plus a paragraph that proves you read the source — what belongs in the annotation, how long it should be, and a structure you can reuse for every entry.

What an annotated bibliography is for

An annotated bibliography is a reference list where each citation is followed by a short paragraph about the source. Instructors assign it to prove engagement with the literature; researchers write one as the staging ground for a literature review — done well, the review’s related-work section almost writes itself from the annotations.

Three annotation types, often combined: descriptive (what the source studies and finds), evaluative (how credible and rigorous it is), and reflective (how it serves your project). Check the assignment brief for which mix is expected.

A four-sentence skeleton that always works

For a 120–180 word annotation, cover four moves in order:

  • Claim — what the source studies and its main finding or argument, in one sentence.
  • Method — the evidence behind it: design, sample, data (one sentence).
  • Judgment — a strength and a limitation that matter for your purposes.
  • Use — how it connects to your research question or thesis.

A worked example (APA)

Chen, M., & Okafor, J. (2023). Sleep deprivation and working memory. Cognitive Science. — The authors review 47 experimental studies of acute sleep loss and find that working-memory deficits concentrate in tasks with high attentional demands. The meta-analytic design gives breadth, though reliance on self-reported sleep duration likely inflates the effects, and student samples dominate the literature. The paper’s task-demand framework offers a ready-made moderator for my study of shift workers, and its bibliography maps the field’s empirical core.

Notice what is absent: no abstract-copying, no "this interesting article", no summary of every section. Every sentence earns its place.

Formatting rules

Alphabetize entries by first author (APA/MLA convention), format each citation exactly as in a normal reference list for your style, and indent the annotation as a block under its citation. Keep annotation length consistent across entries — a 40-word annotation next to a 300-word one signals uneven reading.

Where Kahubi fits

Kahubi’s annotated bibliography flow takes papers from your library (including anything synced from Zotero or Mendeley), formats the citations in your chosen style, and drafts a structured annotation per paper from title and abstract — tuned to your brief — which you then edit with the full text at hand. Export lands as a compiled document.

Last updated 2026-07-09.

Frequently asked questions

How long should each annotation be?
The common assignment range is 100–200 words per source. Purely descriptive annotations run shorter; evaluative-plus-reflective ones toward 200. Consistency across entries matters more than the exact count.
Is an annotated bibliography the same as a literature review?
No — an annotated bibliography treats sources one by one; a literature review synthesizes across them, organized by themes and arguments rather than by source. The bibliography is excellent raw material for the review.
Can I use the abstract as the annotation?
No. Abstracts summarize the paper for its authors’ purposes; annotations assess it for yours. Markers check for this, and evaluative or reflective elements never appear in abstracts.

Related

Draft your annotated bibliography from your library

Pick the papers, choose the style, get structured annotations to edit. Free plan included.