MLA

Forsyth, James W. (James William), 1836-1906. "Field return of Seventh Cavalry in the field commanded by Colonel James W. Forsyth...". Box 10 (Oversize), folder 171. 1890 Dec. https://collections.library.yale.edu/catalog/2021377.

APA, 6th edition

Forsyth, James W. (James William), 1836-1906. (["Box 10 (Oversize), folder 171"])(1890 Dec)["Field return of Seventh Cavalry in the field commanded by Colonel James W. Forsyth..."]. https://collections.library.yale.edu/catalog/2021377.