MLA

Van Vechten, Carl, 1880-1964. Belafonte, Harry. Box 84, folder 1398. 1954 February 18. https://collections.library.yale.edu/catalog/2020831.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 84, folder 1398"])(1954 February 18)[Belafonte, Harry]. https://collections.library.yale.edu/catalog/2020831.