MLA

Van Vechten, Carl, 1880-1964. LeNoire, Rosetta. Box 110, folder 2049. 1942 September 11. https://collections.library.yale.edu/catalog/2026142.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 110, folder 2049"])(1942 September 11)[LeNoire, Rosetta]. https://collections.library.yale.edu/catalog/2026142.