MLA

Van Vechten, Carl, 1880-1964. Walker, Margaret. Box 107 | Folder 1948. 1942 November 27. https://collections.library.yale.edu/catalog/2001939.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 107 | Folder 1948"])(1942 November 27)[Walker, Margaret]. https://collections.library.yale.edu/catalog/2001939.