Cite

Untitled [Self-addressed envelope with postmark and stamp]

MLA

Steinberg, Saul, 1914-1999. Untitled [Self-addressed envelope with postmark and stamp]. Box 76, folder 1441. 1984. https://collections.library.yale.edu/catalog/16855940.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 76, folder 1441"])(1984)[Untitled [Self-addressed envelope with postmark and stamp]]. https://collections.library.yale.edu/catalog/16855940.