WHAT IS AN ANNOTATED BIBLIOGRAPHY?
An annotated bibliography is a list of sources accompanied by annotations or short descriptions of how you used the source in your project. Annotated bibliographies are a key component of every National History Day® (NHD) project.
Creating an annotated bibliography lets your reader know what sources you used to create your project.
An annotated bibliography tells the reader the number, quality, and range of sources used. It provides evidence of the many hours you spent researching in libraries, archives, and classrooms.
The annotation informs the reader how you used your sources and why they were valuable to understanding your topic.
From The NHD Annotated Bibliography Page