The Chicago Manual of Style offers the most detailed prescriptions for formatting and referencing. Its Notes & Bibliography version uses footnotes or endnotes to provide more detail in citations than any other style, with a cleaner and more readable text. Historians in particular favour this style for its ease of use with unpublished primary sources.
Guide and Template for term papers and assignments:
Chicago Style (Notes & Bibliography) Citation & Reference Guide:
Guide and Template for major projects (theses, dissertations, & publications):
The CMOS site: