Cite

Untitled [Envelope with faux stamps]

MLA

Steinberg, Saul, 1914-1999. Untitled [Envelope with faux stamps]. Box 76, folder 1438. undated. https://collections.library.yale.edu/catalog/16855937.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 76, folder 1438"])(undated)[Untitled [Envelope with faux stamps]]. https://collections.library.yale.edu/catalog/16855937.