MLA

Van Vechten, Carl, 1880-1964. Cusick, Edla Frankau. Box 342 | Folder 4436. 1934 October 15. https://collections.library.yale.edu/catalog/2030618.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 342 | Folder 4436"])(1934 October 15)[Cusick, Edla Frankau]. https://collections.library.yale.edu/catalog/2030618.