MLA

Van Vechten, Carl, 1880-1964. Reed, Susan. Box 372, folder 5317. 1945 November 6. https://collections.library.yale.edu/catalog/10001436.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 372, folder 5317"])(1945 November 6)[Reed, Susan]. https://collections.library.yale.edu/catalog/10001436.