Untitled [Boulders on hill with moving wheelchair]
MLA
Steinberg, Saul, 1914-1999. Untitled [Boulders on hill with moving wheelchair]. Box 75, folder 1371. undated. https://collections.library.yale.edu/catalog/16855652.
APA, 6th edition
Steinberg, Saul, 1914-1999. (["Box 75, folder 1371"])(undated)[Untitled [Boulders on hill with moving wheelchair]]. https://collections.library.yale.edu/catalog/16855652.