MLA

Erdoes, Richard, 1912-2008. NYC Naming Ceremony. Box 70 | Sioux Ceremonies 1. 1971, undated. https://collections.library.yale.edu/catalog/2094805.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 70 | Sioux Ceremonies 1"])(1971, undated)[NYC Naming Ceremony]. https://collections.library.yale.edu/catalog/2094805.