MLA

Marsh, Othniel Charles, 1831-1899. Meyer, Otto. Box 23, folder 929. 1883-1885. https://collections.library.yale.edu/catalog/32563685.

APA, 6th edition

Marsh, Othniel Charles, 1831-1899. (["Box 23, folder 929"])(1883-1885)[Meyer, Otto]. https://collections.library.yale.edu/catalog/32563685.