Cite

Untitled [Mock-up of New Yorker cover: Blue jay]

MLA

Steinberg, Saul, 1914-1999. Untitled [Mock-up of New Yorker cover: Blue jay]. Box 456, folder 6300. undated. https://collections.library.yale.edu/catalog/16851471.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 456, folder 6300"])(undated)[Untitled [Mock-up of New Yorker cover: Blue jay]]. https://collections.library.yale.edu/catalog/16851471.