Citing Sources 

Some subject areas, or disciplines, use a specific style manual:

Biology: Scientific Style and Format: the CSE Manual for Authors, Editors, and Publishers

Business: AMA Style Guide for Business Writing

Chemistry: ACS Style Guide: Effective Communication of Scientific Information

Government Documents: Complete Guide to Citing Government Information Resources

Journalism: New York Times Manual of Style and Usage, Associated Press Stylebook and Briefing on Media Law

Music: How to Write about Music: the RILM Manual of Style