MLA

Van Vechten, Carl, 1880-1964. Arthur, Jean. Box 333, folder 4159. circa 1934. https://collections.library.yale.edu/catalog/2030169.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 333, folder 4159"])(circa 1934)[Arthur, Jean]. https://collections.library.yale.edu/catalog/2030169.