MLA

Van Vechten, Carl, 1880-1964. Kay, Ulysses. Box 95 | Folder 1685. 1947 November 13. https://collections.library.yale.edu/catalog/2025773.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 95 | Folder 1685"])(1947 November 13)[Kay, Ulysses]. https://collections.library.yale.edu/catalog/2025773.