Cite

Untitled [Sphinx leaning toward man; Cat drawing lines]

MLA

Steinberg, Saul, 1914-1999. Untitled [Sphinx leaning toward man; Cat drawing lines]. Box 75, folder 1416. undated. https://collections.library.yale.edu/catalog/16855697.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 75, folder 1416"])(undated)[Untitled [Sphinx leaning toward man; Cat drawing lines]]. https://collections.library.yale.edu/catalog/16855697.