MLA

Van Vechten, Carl, 1880-1964. Hull, Elizabeth Shaffer. Box 354, folder 4776. 1932 March 23. https://collections.library.yale.edu/catalog/2047337.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 354, folder 4776"])(1932 March 23)[Hull, Elizabeth Shaffer]. https://collections.library.yale.edu/catalog/2047337.