Untitled [Knight on horse]
MLA
Steinberg, Saul, 1914-1999. Untitled [Knight on horse]. Box 80, folder 1855. undated. https://collections.library.yale.edu/catalog/16856421.
APA, 6th edition
Steinberg, Saul, 1914-1999. (["Box 80, folder 1855"])(undated)[Untitled [Knight on horse]]. https://collections.library.yale.edu/catalog/16856421.