MLA

Steinberg, Saul, 1914-1999. Untitled [Woman in bathtub]. Box 79, folder 1687. undated. https://collections.library.yale.edu/catalog/32475571.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 79, folder 1687"])(undated)[Untitled [Woman in bathtub]]. https://collections.library.yale.edu/catalog/32475571.