MLA

Van Vechten, Carl, 1880-1964. Markova, Alicia, Dame. Box 366 | Folder 5113. 1963 May 15. https://collections.library.yale.edu/catalog/2066575.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 366 | Folder 5113"])(1963 May 15)[Markova, Alicia, Dame]. https://collections.library.yale.edu/catalog/2066575.