MLA

Van Vechten, Carl, 1880-1964. Daninos, Pierre. Box 343, folder 4447. 1957 November 1. https://collections.library.yale.edu/catalog/2032394.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 343, folder 4447"])(1957 November 1)[Daninos, Pierre]. https://collections.library.yale.edu/catalog/2032394.