MLA

Steinberg, Saul, 1914-1999. Untitled [Man with hat and glasses drawn with straight simple lines and a messy man drawn in free form]. Box 375, folder 5052. 1954. https://collections.library.yale.edu/catalog/16854824.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 375, folder 5052"])(1954)[Untitled [Man with hat and glasses drawn with straight simple lines and a messy man drawn in free form]]. https://collections.library.yale.edu/catalog/16854824.