Zotero provides the ability to save sources from catalogs, databases, and other websites with one click.
You can then organize and edit the citation entries, which makes it great for annotated bibliographies, research papers, and more!
The Citation Style Guide has plenty of information to help you better understand the citation style your professor is asking for.
American Sociological Association fact sheet : PDF from the ASA with tips on writing in ASA Style.
Some useful online resources include:
UMGC Library:
Chicago Citation Examples
Excelsior College OWL:
Chicago Notes & Bibliography
Colorado State University:
Chicago Manual of Style