MLA

Van Vechten, Carl, 1880-1964. Valentine, Grace. Box 106 | Folder 1941. 1932 April 13. https://collections.library.yale.edu/catalog/2028225.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 106 | Folder 1941"])(1932 April 13)[Valentine, Grace]. https://collections.library.yale.edu/catalog/2028225.