MLA

Van Vechten, Carl, 1880-1964. Odets, Clifford. Box 370, folder 5239. 1937 September 2. https://collections.library.yale.edu/catalog/2109534.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 370, folder 5239"])(1937 September 2)[Odets, Clifford]. https://collections.library.yale.edu/catalog/2109534.