MLA

Marsh, Othniel Charles, 1831-1899. Campbell, Quintin. Box 5, folder 202. 1871. https://collections.library.yale.edu/catalog/32554539.

APA, 6th edition

Marsh, Othniel Charles, 1831-1899. (["Box 5, folder 202"])(1871)[Campbell, Quintin]. https://collections.library.yale.edu/catalog/32554539.