MLA

Erdoes, Richard, 1912-2008. Sundance Pine Ridge 1971 Close Up. Box 67 | Sundances Sioux. 1971, undated. https://collections.library.yale.edu/catalog/2092535.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 67 | Sundances Sioux"])(1971, undated)[Sundance Pine Ridge 1971 Close Up]. https://collections.library.yale.edu/catalog/2092535.