MLA

Van Vechten, Carl, 1880-1964. Franklin, Roy. Box 348 | Folder 4618. 1951 September 2. https://collections.library.yale.edu/catalog/2034746.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 348 | Folder 4618"])(1951 September 2)[Franklin, Roy]. https://collections.library.yale.edu/catalog/2034746.