MLA

Marsh, Othniel Charles, 1831-1899. Wheatley, Charles M.. Box 35, folder 1487. 1868. https://collections.library.yale.edu/catalog/32570383.

APA, 6th edition

Marsh, Othniel Charles, 1831-1899. (["Box 35, folder 1487"])(1868)[Wheatley, Charles M.]. https://collections.library.yale.edu/catalog/32570383.