MLA

Van Vechten, Carl, 1880-1964. Grigsby, Emilie. Box 351 | Folder 4698. 1934 April 6. https://collections.library.yale.edu/catalog/2036139.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 351 | Folder 4698"])(1934 April 6)[Grigsby, Emilie]. https://collections.library.yale.edu/catalog/2036139.