Butler, Robert
MLA
Marsh, Othniel Charles, 1831-1899. Butler, Robert. Box 5, folder 193. 1897. https://collections.library.yale.edu/catalog/32554461.
APA, 6th edition
Marsh, Othniel Charles, 1831-1899. (["Box 5, folder 193"])(1897)[Butler, Robert]. https://collections.library.yale.edu/catalog/32554461.