Loper, S.W.
MLA
Marsh, Othniel Charles, 1831-1899. Loper, S.W.. Box 21, folder 850. 1870-1872. https://collections.library.yale.edu/catalog/32562928.
APA, 6th edition
Marsh, Othniel Charles, 1831-1899. (["Box 21, folder 850"])(1870-1872)[Loper, S.W.]. https://collections.library.yale.edu/catalog/32562928.