MLA

Van Vechten, Carl, 1880-1964. Langner, Philip. Box 360 | Folder 4950. 1944 February 24. https://collections.library.yale.edu/catalog/2056148.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 360 | Folder 4950"])(1944 February 24)[Langner, Philip]. https://collections.library.yale.edu/catalog/2056148.