Cite

Untitled [Envelope with faux stamp]

MLA

Steinberg, Saul, 1914-1999. Untitled [Envelope with faux stamp]. Box 76, folder 1439. undated. https://collections.library.yale.edu/catalog/16855938.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 76, folder 1439"])(undated)[Untitled [Envelope with faux stamp]]. https://collections.library.yale.edu/catalog/16855938.