MLA

Van Vechten, Carl, 1880-1964. Mauriber, Saul. Box 366 | Folder 5136. 1944 March 9. https://collections.library.yale.edu/catalog/2066683.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 366 | Folder 5136"])(1944 March 9)[Mauriber, Saul]. https://collections.library.yale.edu/catalog/2066683.