Business, psychology, and other social sciences
History, religion & theology, humanities, some sciences
History, religion & theology, other humanities
NOTE: Many people refer to "Chicago" and "Turabian" interchangeably. Though they are similar in structure, there are significant differences. Be mindful about which guide you should use.
English literature, non-English literature, other humanities
Science researchers often use the citation style of leading journals instead of a standardized style. Ask your instructor about the preferred style. Here are some common science citation styles; be aware that your requirements may differ.