MLA

Van Vechten, Carl, 1880-1964. Barber, Samuel. Box 334 | Folder 4188. 1944 December 11. https://collections.library.yale.edu/catalog/2030355.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 334 | Folder 4188"])(1944 December 11)[Barber, Samuel]. https://collections.library.yale.edu/catalog/2030355.