Cite

40b. [Blackfoot Camp in the Evening with Three Men on Horseback.]

MLA

McClintock, Walter, 1870-1949. 40b. [Blackfoot Camp in the Evening with Three Men on Horseback.]. Box 60, folder 2980. 1941. https://collections.library.yale.edu/catalog/2008424.

APA, 6th edition

McClintock, Walter, 1870-1949. (["Box 60, folder 2980"])(1941)[40b. [Blackfoot Camp in the Evening with Three Men on Horseback.]]. https://collections.library.yale.edu/catalog/2008424.