MLA

Steinberg, Saul, 1914-1999. Scrapbook. Box 120, folder 2333. circa 1951. https://collections.library.yale.edu/catalog/2016884.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 120, folder 2333"])(circa 1951)[Scrapbook]. https://collections.library.yale.edu/catalog/2016884.