MLA

Erdoes, Richard, 1912-2008. Old Photos Southwest. Box 52 | Plains Dances, Rodeos, Old Photographs. 1976, undated. https://collections.library.yale.edu/catalog/2081913.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 52 | Plains Dances, Rodeos, Old Photographs"])(1976, undated)[Old Photos Southwest]. https://collections.library.yale.edu/catalog/2081913.