Cite

Untitled [Self-addressed envelope with faux stamp]

MLA

Steinberg, Saul, 1914-1999. Untitled [Self-addressed envelope with faux stamp]. Box 76, folder 1487. undated. https://collections.library.yale.edu/catalog/16855985.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 76, folder 1487"])(undated)[Untitled [Self-addressed envelope with faux stamp]]. https://collections.library.yale.edu/catalog/16855985.