MLA

Erdoes, Richard, 1912-2008. Tipi Ritual. Box 70 | Sioux Ceremonies 1. 1976-1983, undated. https://collections.library.yale.edu/catalog/2094524.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 70 | Sioux Ceremonies 1"])(1976-1983, undated)[Tipi Ritual]. https://collections.library.yale.edu/catalog/2094524.