Labyrinth: [Four Cubes with squiggles]
MLA
Steinberg, Saul, 1914-1999. Labyrinth: [Four Cubes with squiggles]. Box 524 (Oversize), folder 7109. 1958. https://collections.library.yale.edu/catalog/2022953.
APA, 6th edition
Steinberg, Saul, 1914-1999. (["Box 524 (Oversize), folder 7109"])(1958)[Labyrinth: [Four Cubes with squiggles]]. https://collections.library.yale.edu/catalog/2022953.