MLA

Erdoes, Richard, 1912-2008. Oohosis Sandy. Box 61 | Indian People, Powwows. 1971, undated. https://collections.library.yale.edu/catalog/2088036.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 61 | Indian People, Powwows"])(1971, undated)[Oohosis Sandy]. https://collections.library.yale.edu/catalog/2088036.