MLA

Van Vechten, Carl, 1880-1964. Archibald, William. Box 333, folder 4153. 1956 January 2. https://collections.library.yale.edu/catalog/2030093.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 333, folder 4153"])(1956 January 2)[Archibald, William]. https://collections.library.yale.edu/catalog/2030093.