The following are quick links to some of the most commonly used style manuals for undergraduate and postgraduate work and for citations in books to be published.
The Chicago Manual of Style:
http://www.chicagomanualofstyle.org
Quick citation guide for The Chicago Manual of Style:
http://www.chicagomanualofstyle.org/tools_citationguide.html
Useful short guide for notes and bibliography (Chicago Manual of Style):
http://www.smu.ca/webfiles/ChicagoStylenotesbib2011-1.pdf
The MHRA Style Guide:
http://www.mhra.org.uk/Publications/Books/StyleGuide/
The APA Style Guide:
https://owl.english.purdue.edu/owl/resource/560/01/
