MLA

Erdoes, Richard, 1912-2008. Small Girls. Box 60 | Indian People, Powwows. 1971-1978, undated. https://collections.library.yale.edu/catalog/2087503.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 60 | Indian People, Powwows"])(1971-1978, undated)[Small Girls]. https://collections.library.yale.edu/catalog/2087503.