MLA

Van Vechten, Carl, 1880-1964. Sharaff, Irene. Box 375 | Folder 5420. 1940 February 27. https://collections.library.yale.edu/catalog/10052420.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 375 | Folder 5420"])(1940 February 27)[Sharaff, Irene]. https://collections.library.yale.edu/catalog/10052420.