Cite

Untitled [Man with mustache looking out a window]

MLA

Steinberg, Saul, 1914-1999. Untitled [Man with mustache looking out a window]. Box 428, folder 5836. undated. https://collections.library.yale.edu/catalog/33488512.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 428, folder 5836"])(undated)[Untitled [Man with mustache looking out a window]]. https://collections.library.yale.edu/catalog/33488512.