Cite

Untitled [Abstraction in tunnel]

MLA

Steinberg, Saul, 1914-1999. Untitled [Abstraction in tunnel]. Box 468, folder 6548. undated. https://collections.library.yale.edu/catalog/2016882.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 468, folder 6548"])(undated)[Untitled [Abstraction in tunnel]]. https://collections.library.yale.edu/catalog/2016882.