MLA

Van Vechten, Carl, 1880-1964. Bledger, Al. Box 84 | Folder 1409. 1938 March 25. https://collections.library.yale.edu/catalog/2020992.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 84 | Folder 1409"])(1938 March 25)[Bledger, Al]. https://collections.library.yale.edu/catalog/2020992.