MLA

Van Vechten, Carl, 1880-1964. Van Vechten, Carl. Box 380 | Folder 5624. 1947 May 15. https://collections.library.yale.edu/catalog/10617902.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 380 | Folder 5624"])(1947 May 15)[Van Vechten, Carl]. https://collections.library.yale.edu/catalog/10617902.