MLA

Van Vechten, Carl, 1880-1964. Dowell, Coleman. Box 345 | Folder 4506. 1957 January 27. https://collections.library.yale.edu/catalog/2033444.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 345 | Folder 4506"])(1957 January 27)[Dowell, Coleman]. https://collections.library.yale.edu/catalog/2033444.