MLA

Erdoes, Richard, 1912-2008. Mt. Rushmore 1971. Box 56 | Hokahay, Indian Civil Rights. 1971-1983, undated. https://collections.library.yale.edu/catalog/2084752.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 56 | Hokahay, Indian Civil Rights"])(1971-1983, undated)[Mt. Rushmore 1971]. https://collections.library.yale.edu/catalog/2084752.