MLA

J. Sklar and Company, Thomson, Grant, MD. Davidson Pneumothroax Apparatus. Box 054. 1940. https://collections.library.yale.edu/catalog/17319729.

APA, 6th edition

J. Sklar and Company, & Thomson, Grant, MD. (["Box 054"])(1940)[Davidson Pneumothroax Apparatus]. https://collections.library.yale.edu/catalog/17319729.