MLA

Van Vechten, Carl, 1880-1964. Wright, Richard. Box 109, folder 2013. 1946 March 8. https://collections.library.yale.edu/catalog/2028873.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 109, folder 2013"])(1946 March 8)[Wright, Richard]. https://collections.library.yale.edu/catalog/2028873.