MLA

Brush, George Jarvis, 1831-1912. Sheffield, Charles Joseph (1). Box 4, folder 117. 1868. https://collections.library.yale.edu/catalog/32513533.

APA, 6th edition

Brush, George Jarvis, 1831-1912. (["Box 4, folder 117"])(1868)[Sheffield, Charles Joseph (1)]. https://collections.library.yale.edu/catalog/32513533.