MLA

Van Vechten, Carl, 1880-1964. Laing, Hugh, as Her Cavalier in Gala Performance, choreographed by Antony Tudor. Box 358, folder 4913. 1941 February 16. https://collections.library.yale.edu/catalog/2055601.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 358, folder 4913"])(1941 February 16)[Laing, Hugh, as Her Cavalier in Gala Performance, choreographed by Antony Tudor]. https://collections.library.yale.edu/catalog/2055601.