This and Turabian are the only major style manuals which continue to use footnotes or endnotes and a bibliography. It is used in the humanities and social sciences, especially in history.
Preferred dictionary by many style manuals for spelling, capitalization, etc. Part of the Encyclopedia Britannica Online. Limit to Merriam-Webster Dictionary & Thesaurus when searching.
The Chicago Manual of Style by 
A Manual for Writers of Research Papers, Theses, and Dissertations by 
A Dictionary of Modern American Usage by 
