MLA

Van Vechten, Carl, 1880-1964. Wiener, Paul Lester. Box 383, folder 5714. 1947 November 13. https://collections.library.yale.edu/catalog/10639643.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 383, folder 5714"])(1947 November 13)[Wiener, Paul Lester]. https://collections.library.yale.edu/catalog/10639643.