MLA

Erdoes, Richard, 1912-2008. David Baker. Box 61 | Indian People, Powwows. undated. https://collections.library.yale.edu/catalog/2088070.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 61 | Indian People, Powwows"])(undated)[David Baker]. https://collections.library.yale.edu/catalog/2088070.