MLA

McClintock, Walter, 1870-1949. F816d.2. Water Carriers. At Lake. Horse Drinking. Mother With Baby. Returning.. Box 139, folder 6738. 1908. https://collections.library.yale.edu/catalog/10452425.

APA, 6th edition

McClintock, Walter, 1870-1949. (["Box 139, folder 6738"])(1908)[F816d.2. Water Carriers. At Lake. Horse Drinking. Mother With Baby. Returning.]. https://collections.library.yale.edu/catalog/10452425.