MLA

Erdoes, Richard, 1912-2008. Old Men. Box 61 | Indian People, Powwows. 1968-1975, undated. https://collections.library.yale.edu/catalog/2087977.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 61 | Indian People, Powwows"])(1968-1975, undated)[Old Men]. https://collections.library.yale.edu/catalog/2087977.