MLA

Van Vechten, Carl, 1880-1964. White, Portia. Box 108, folder 1985. 1944 December 2. https://collections.library.yale.edu/catalog/2028658.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 108, folder 1985"])(1944 December 2)[White, Portia]. https://collections.library.yale.edu/catalog/2028658.