Cite

Barnhart, G.W.

MLA

Marsh, Othniel Charles, 1831-1899. Barnhart, G.W.. Box 2, folder 61. 1868?. https://collections.library.yale.edu/catalog/32209273.

APA, 6th edition

Marsh, Othniel Charles, 1831-1899. (["Box 2, folder 61"])(1868?)[Barnhart, G.W.]. https://collections.library.yale.edu/catalog/32209273.