"Annotated Bibliographies: An Illustrated Guide," from Carnegie Vincent Library at Lincoln Memorial University, April 2012, 3 minutes.
According to the Excelsior Online Writing Lab:
A bibliography is an alphabetized list of sources showing the author, date, and publication information for each source.
An annotation is like a note; it's a brief paragraph that explains what the writer learned from the source.
Annotated bibliographies combine bibliographies and brief notes about the sources.