Your instructor may indicate which style they want you to use in the assignment's description or class syllabus. Below are the generally recommended subject specific style guides.
An annotated bibliography is a list of sources (books, articles, presentations, etc.) where each source is followed by a brief summary paragraph describing/evaluating the source. You can use annotated bibliographies to organize your work, provide an evaluation of resources in a certain discipline, and share insights for readers who might be looking to use those resources in their work.