37. [Horse Herd and Two Herders on the Prairie.]
MLA
McClintock, Walter, 1870-1949. 37. [Horse Herd and Two Herders on the Prairie.]. Box 70, folder 3919. 1905 1941. https://collections.library.yale.edu/catalog/2010772.
APA, 6th edition
McClintock, Walter, 1870-1949. (["Box 70, folder 3919"])(1905 1941)[37. [Horse Herd and Two Herders on the Prairie.]]. https://collections.library.yale.edu/catalog/2010772.