MLA

Marsh, Othniel Charles, 1831-1899. Torrer, Alphonse. Box 32, folder 1384. 1872-1873. https://collections.library.yale.edu/catalog/32568886.

APA, 6th edition

Marsh, Othniel Charles, 1831-1899. (["Box 32, folder 1384"])(1872-1873)[Torrer, Alphonse]. https://collections.library.yale.edu/catalog/32568886.