MLA

Forsyth, James W. (James William), 1836-1906. "Adventures of American Army and Navy Offices" by Guy V. Henry in Harper's Weekly (photocopy of original). Box 10 (Oversize), folder 185. 1896 Dec 26. https://collections.library.yale.edu/catalog/16706147.

APA, 6th edition

Forsyth, James W. (James William), 1836-1906. (["Box 10 (Oversize), folder 185"])(1896 Dec 26)["Adventures of American Army and Navy Offices" by Guy V. Henry in Harper's Weekly (photocopy of original)]. https://collections.library.yale.edu/catalog/16706147.