AMA (American Medical Association) Style Provides basic examples for in-text citations, as well as for the Reference List. See thePRINT guide at the Reference Desk.
CSE (Council of Science Editors) Provides basic examples for in-text citations, as well as for the Reference List. See the PRINT guide at the Reference Desk.
Government Documents
A bibliography with links to info on how to cite government documents (from Columbia University Libraries)