MLA

Steinberg, Saul, 1914-1999. Gallery and exhibition ephemera. Box 184, folder 3416-3420 | Box 654 (Broadside) | Box 655 (Broadside). circa 1940-1998, undated. https://collections.library.yale.edu/catalog/2068000.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 184, folder 3416-3420 | Box 654 (Broadside) | Box 655 (Broadside)"])(circa 1940-1998, undated)[Gallery and exhibition ephemera]. https://collections.library.yale.edu/catalog/2068000.