MLA

Steinberg, Saul, 1914-1999. Sidney Janis Gallery. Box 58, folder 1059. 1955–1980. https://collections.library.yale.edu/catalog/32316666.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 58, folder 1059"])(1955–1980)[Sidney Janis Gallery]. https://collections.library.yale.edu/catalog/32316666.