MLA

Erdoes, Richard, 1912-2008. "Monument Valley Petroglyphs". Box 56. 1975-1986, undated. https://collections.library.yale.edu/catalog/2084928.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 56"])(1975-1986, undated)["Monument Valley Petroglyphs"]. https://collections.library.yale.edu/catalog/2084928.