MLA

Marsh, Othniel Charles, 1831-1899. Alaska Commercial Company. Box 1, folder 12. 1872. https://collections.library.yale.edu/catalog/32206930.

APA, 6th edition

Marsh, Othniel Charles, 1831-1899. (["Box 1, folder 12"])(1872)[Alaska Commercial Company]. https://collections.library.yale.edu/catalog/32206930.