Cite

Untitled [Bird holding knife]

MLA

Steinberg, Saul, 1914-1999. Untitled [Bird holding knife]. Box 80, folder 1854. undated. https://collections.library.yale.edu/catalog/16856420.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 80, folder 1854"])(undated)[Untitled [Bird holding knife]]. https://collections.library.yale.edu/catalog/16856420.