MLA

Van Vechten, Carl, 1880-1964. Davis, Jimmy. Box 88, folder 1515. 1942 July 27. https://collections.library.yale.edu/catalog/2022101.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 88, folder 1515"])(1942 July 27)[Davis, Jimmy]. https://collections.library.yale.edu/catalog/2022101.