MLA

Erdoes, Richard, 1912-2008. "Acoma Historical". Box 49. 1973, undated. https://collections.library.yale.edu/catalog/2080001.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 49"])(1973, undated)["Acoma Historical"]. https://collections.library.yale.edu/catalog/2080001.