The Chicago Manual of Style, 18th EditionChicago-style source citations come in two varieties: (1) notes and bibliography and (2) author-date. If you already know which system to use, follow one of the links above to see sample citations for a variety of common sources. If you are unsure about which system to use, or how the two systems are related, read on. Notes and Bibliography or Author-Date? In the notes and bibliography system, sou
