F522. Elk Horn and Myself [Walter McClintock] in Camp.
MLA
McClintock, Walter, 1870-1949. F522. Elk Horn and Myself [Walter McClintock] in Camp.. Box 136, folder 6160. 1905 Summer. https://collections.library.yale.edu/catalog/10451836.
APA, 6th edition
McClintock, Walter, 1870-1949. (["Box 136, folder 6160"])(1905 Summer)[F522. Elk Horn and Myself [Walter McClintock] in Camp.]. https://collections.library.yale.edu/catalog/10451836.