McCarthy, H.M.
MLA
Marsh, Othniel Charles, 1831-1899. McCarthy, H.M.. Box 22, folder 873. undated. https://collections.library.yale.edu/catalog/32563157.
APA, 6th edition
Marsh, Othniel Charles, 1831-1899. (["Box 22, folder 873"])(undated)[McCarthy, H.M.]. https://collections.library.yale.edu/catalog/32563157.