MLA

Erdoes, Richard, 1912-2008. Stairs. Box 49 | Acoma, Houses, Streets, Scapes. 1975, undated. https://collections.library.yale.edu/catalog/2079685.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 49 | Acoma, Houses, Streets, Scapes"])(1975, undated)[Stairs]. https://collections.library.yale.edu/catalog/2079685.