MLA

Marsh, Othniel Charles, 1831-1899. Brown, Frederick. Box 5, folder 159. 1877-1883. https://collections.library.yale.edu/catalog/32553938.

APA, 6th edition

Marsh, Othniel Charles, 1831-1899. (["Box 5, folder 159"])(1877-1883)[Brown, Frederick]. https://collections.library.yale.edu/catalog/32553938.