Library: Computer Science at Webster University Library: Writing / Citing

Chicago Manual of Style: Author-Date Sample Citations
Examples from the CMOS website that illustrate the author-date system. Each example of a reference list entry is accompanied by an example of a corresponding in-text citation.
Purdue OWL: Chicago manual of style (17th ed.)
Western Oregon University: Chicago style guide
Great detailed information from Western Oregon University on formatting and citing with Chicago style.

Purdue OWL: MLA formatting and style
MLA citation help from the Purdue Online Writing Lab (9th edition)
MLA Style Center
MLA's own online citation help for the 9th edition
Webster University Libraries: MLA style guide