MLA

Marsh, Othniel Charles, 1831-1899. Berger, Charles F.. Box 3, folder 104. 1875-1885. https://collections.library.yale.edu/catalog/32553356.

APA, 6th edition

Marsh, Othniel Charles, 1831-1899. (["Box 3, folder 104"])(1875-1885)[Berger, Charles F.]. https://collections.library.yale.edu/catalog/32553356.