Citation styles vary by discipline. The variation reflects the most important aspects of the citation for a particular discipline. for example, in the sciences the names of the scientists are of great importance because often a scientist's career develops around a research agenda and bringing together the work of that scientist can provide an historic view of the development of knowledge in that particular research agenda.
The following style guides are available at the Vogel Library reference desk for two-hour check out. Stop by the reference desk or schedule an appointment with a librarian if you need assistance.