Even experienced writers and researchers sometimes confuse literature reviews with annotated bibliographies. The two have very different structures and purposes. Additionally, the annotated bibliography is often the precursor to a literature review. It identifies sources that will be used to inform the thinking and organization of the literature review. Here's a quick guide to the components of a literature review, compared to an annotated bibliography.
(Source: University of North Alabama Center for Writing Excellence, http://www.una.edu/writingcenter/)