The Chicago Manual of Style presents two basic documentation systems: (1) notes and bibliography and (2) author-date. Choosing between the two often depends on subject matter and the nature of sources cited, as each system is favored by different groups of scholars.
The notes and bibliography style is preferred by many in the humanities, including those in literature, history, and the arts. This style presents bibliographic information in notes and, often, a bibliography. It accommodates a variety of sources, including esoteric ones less appropriate to the author-date system.
The Council of Science Editors - CSE - is the primary authority for biology and other natural sciences formatting style. Scientific Style and Format is the most recognized, authoritative reference for authors, editors, publishers, students, and translators in all areas of science and related fields.