MLA

Marsh, Othniel Charles, 1831-1899. Bull, Richard. Box 5, folder 181. 1885. https://collections.library.yale.edu/catalog/32554308.

APA, 6th edition

Marsh, Othniel Charles, 1831-1899. (["Box 5, folder 181"])(1885)[Bull, Richard]. https://collections.library.yale.edu/catalog/32554308.