MLA

Steinberg, Saul, 1914-1999. Inspector: [Man leaping off cliff]. Box 538 (Oversize), folder 7253. circa 1967-1973. https://collections.library.yale.edu/catalog/16855275.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 538 (Oversize), folder 7253"])(circa 1967-1973)[Inspector: [Man leaping off cliff]]. https://collections.library.yale.edu/catalog/16855275.