MLA

Van Vechten, Carl, 1880 - 1964. Rubin, David, in Stamford, Connecticut. Box 373 | Folder 5347. 1951 September 16. https://collections.library.yale.edu/catalog/10033934.

APA, 6th edition

Van Vechten, Carl, 1880 - 1964. (["Box 373 | Folder 5347"])(1951 September 16)[Rubin, David, in Stamford, Connecticut]. https://collections.library.yale.edu/catalog/10033934.