This is the complete, fully-searchable text of the 17th (2017) edition of the Chicago Manual of Style. In addition to showing the correct formats for citing bibliographic references, it also provides guidance on grammar, usage, punctuation, spelling, and other aspects of good writing.
"In addition to being one of the major citation guides used in academic writing, The Chicago Manual of Style also provides guidance on correct grammar, usage, punctuation, spelling, and other aspects of good writing.