MLA

Steinberg, Saul, 1914-1999. Untitled [Various machines]. Box 78, folder 1637. circa 1942. https://collections.library.yale.edu/catalog/32457624.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 78, folder 1637"])(circa 1942)[Untitled [Various machines]]. https://collections.library.yale.edu/catalog/32457624.