Cite

Untitled [Farmer pushing wheelbarrow that looks like the United States]

MLA

Steinberg, Saul, 1914-1999. Untitled [Farmer pushing wheelbarrow that looks like the United States]. Box 462, folder 6429. undated. https://collections.library.yale.edu/catalog/16851522.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 462, folder 6429"])(undated)[Untitled [Farmer pushing wheelbarrow that looks like the United States]]. https://collections.library.yale.edu/catalog/16851522.