MLA

Steinberg, Saul, 1914-1999. Untitled [Figure praying at cross with crucified figure and two putti; Figure under tall palm tree]. Box 75, folder 1346. undated. https://collections.library.yale.edu/catalog/16855627.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 75, folder 1346"])(undated)[Untitled [Figure praying at cross with crucified figure and two putti; Figure under tall palm tree]]. https://collections.library.yale.edu/catalog/16855627.