MLA

Van Vechten, Carl, 1880-1964. Bradshaw, Tiny. Box 85, folder 1423. 1942 March 19. https://collections.library.yale.edu/catalog/2021064.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 85, folder 1423"])(1942 March 19)[Bradshaw, Tiny]. https://collections.library.yale.edu/catalog/2021064.