MLA

Van Vechten, Carl, 1880-1964. Carlisle, Kitty. Box 664, folder 14638. 1933 November 1. https://collections.library.yale.edu/catalog/33270850.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 664, folder 14638"])(1933 November 1)[Carlisle, Kitty]. https://collections.library.yale.edu/catalog/33270850.