MLA

Steinberg, Saul, 1914-1999. Untitled [Man holding snake at bus stop]. Box 525 (Oversize), folder 7124. circa 1967. https://collections.library.yale.edu/catalog/16855236.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 525 (Oversize), folder 7124"])(circa 1967)[Untitled [Man holding snake at bus stop]]. https://collections.library.yale.edu/catalog/16855236.