MLA

Steinberg, Saul, 1914-1999. Untitled [Woman holding book]. Box 78, folder 1589. undated. https://collections.library.yale.edu/catalog/32457472.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 78, folder 1589"])(undated)[Untitled [Woman holding book]]. https://collections.library.yale.edu/catalog/32457472.