MLA

Van Vechten, Carl, 1880-1964. Gorer, Geoffrey. Box 351, folder 4677. 1935 December 2. https://collections.library.yale.edu/catalog/2035959.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 351, folder 4677"])(1935 December 2)[Gorer, Geoffrey]. https://collections.library.yale.edu/catalog/2035959.