This document provides instructions on how to write an annotated bibliography in APA style. It defines an annotation as a brief summary that evaluates a source and determines its usefulness for a research topic. Annotations are descriptive, but also include the source's distinctive features and can be evaluative or critical. The document outlines the components of an annotated bibliography and describes the two main types: descriptive annotations that summarize without critique, and analytical annotations that examine strengths, weaknesses and applicability of conclusions. Examples are provided and steps are outlined for writing citations, annotations and bibliographies.