MLA

Van Vechten, Carl, 1880-1964. Olivier, Laurence. Box 370 | Folder 5249. 1939 June 17. https://collections.library.yale.edu/catalog/2112259.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 370 | Folder 5249"])(1939 June 17)[Olivier, Laurence]. https://collections.library.yale.edu/catalog/2112259.