MLA

Marsh, Othniel Charles, 1831-1899. Heisey, Jacob. Box 16, folder 642. 1875. https://collections.library.yale.edu/catalog/32560318.

APA, 6th edition

Marsh, Othniel Charles, 1831-1899. (["Box 16, folder 642"])(1875)[Heisey, Jacob]. https://collections.library.yale.edu/catalog/32560318.