MLA

Frank E. Betz Company, Sundquist, Alfred, B., MD. Endoscopy set. Box 070. https://collections.library.yale.edu/catalog/17316540.

APA, 6th edition

Frank E. Betz Company, & Sundquist, Alfred, B., MD. (["Box 070"])[Endoscopy set]. https://collections.library.yale.edu/catalog/17316540.