MLA

Erdoes, Richard, 1912-2008. Old Photos Crow, Blackfoot. Box 52 | Plains Dances, Rodeos, Old Photographs. undated. https://collections.library.yale.edu/catalog/2081756.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 52 | Plains Dances, Rodeos, Old Photographs"])(undated)[Old Photos Crow, Blackfoot]. https://collections.library.yale.edu/catalog/2081756.