MLA

Van Vechten, Carl, 1880-1964. Stettheimer, Carrie Walter, and Ettie Stettheimer. Box 376 | Folder 5473. 1932 October 8. https://collections.library.yale.edu/catalog/10079548.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 376 | Folder 5473"])(1932 October 8)[Stettheimer, Carrie Walter, and Ettie Stettheimer]. https://collections.library.yale.edu/catalog/10079548.