MLA

Cadmus, Paul, 1904-1999. Slides. Box 111. circa 1940s-1981. https://collections.library.yale.edu/catalog/32552602.

APA, 6th edition

Cadmus, Paul, 1904-1999. (["Box 111"])(circa 1940s-1981)[Slides]. https://collections.library.yale.edu/catalog/32552602.