MLA

McClintock, Walter, 1870-1949. 68. [Five Warriors and Prominent Members of the Brave Dogs. Left to Right, Drags-His-Robe, Mountain Chief, Lone Chief, Flat Tail, and Blood.]. Box 60, folder 3013. 1941. https://collections.library.yale.edu/catalog/2008457.

APA, 6th edition

McClintock, Walter, 1870-1949. (["Box 60, folder 3013"])(1941)[68. [Five Warriors and Prominent Members of the Brave Dogs. Left to Right, Drags-His-Robe, Mountain Chief, Lone Chief, Flat Tail, and Blood.]]. https://collections.library.yale.edu/catalog/2008457.