MLA

Erdoes, Richard, 1912-2008. Ball Court and Monument Valley Ruins. Box 48 | Anasazi Ruins, Arizona, Colorado, included: Tonto, Montezuma, Mesa Verde, Aztec. 1975-1991, undated. https://collections.library.yale.edu/catalog/2079465.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 48 | Anasazi Ruins, Arizona, Colorado, included: Tonto, Montezuma, Mesa Verde, Aztec"])(1975-1991, undated)[Ball Court and Monument Valley Ruins]. https://collections.library.yale.edu/catalog/2079465.