Cite

Untitled [Horse dressed in medieval weapons]

MLA

Steinberg, Saul, 1914-1999. Untitled [Horse dressed in medieval weapons]. Box 80, folder 1856. undated. https://collections.library.yale.edu/catalog/16856422.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 80, folder 1856"])(undated)[Untitled [Horse dressed in medieval weapons]]. https://collections.library.yale.edu/catalog/16856422.