MLA

Van Vechten, Carl, 1880-1964. Richards, Rudy, as Calypso Pete in Howdy, Mr. Ice, choreographed by Catherine Littlefield. Box 372, folder 5322. 1948 September 27. https://collections.library.yale.edu/catalog/10001483.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 372, folder 5322"])(1948 September 27)[Richards, Rudy, as Calypso Pete in Howdy, Mr. Ice, choreographed by Catherine Littlefield]. https://collections.library.yale.edu/catalog/10001483.