MLA

Van Vechten, Carl, 1880-1964. Allen, Sanford. Box 82 | Folder 1346. 1964 November 3. https://collections.library.yale.edu/catalog/2029313.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 82 | Folder 1346"])(1964 November 3)[Allen, Sanford]. https://collections.library.yale.edu/catalog/2029313.