MLA

Erdoes, Richard, 1912-2008. Chiefs, Sioux. Box 46 | Plains Indian History II. 1975-1993, undated. https://collections.library.yale.edu/catalog/2077652.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 46 | Plains Indian History II"])(1975-1993, undated)[Chiefs, Sioux]. https://collections.library.yale.edu/catalog/2077652.