MLA

Van Vechten, Carl, 1880-1964. Jones, Lois Mailou. Box 30, folder 529. 1952 March 11. https://collections.library.yale.edu/catalog/17049338.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 30, folder 529"])(1952 March 11)[Jones, Lois Mailou]. https://collections.library.yale.edu/catalog/17049338.