Cite

33. [Foothills of Blackfoot Country.]

MLA

McClintock, Walter, 1870-1949. 33. [Foothills of Blackfoot Country.]. Box 60, folder 2971. 1941. https://collections.library.yale.edu/catalog/2008415.

APA, 6th edition

McClintock, Walter, 1870-1949. (["Box 60, folder 2971"])(1941)[33. [Foothills of Blackfoot Country.]]. https://collections.library.yale.edu/catalog/2008415.