MLA

Van Vechten, Carl, 1880-1964. Moncion, Francisco, as Sebastian in Sebastian, ballet choreographed by Edward Caton. Box 100, folder 1773. 1944 November 20. https://collections.library.yale.edu/catalog/2026926.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 100, folder 1773"])(1944 November 20)[Moncion, Francisco, as Sebastian in Sebastian, ballet choreographed by Edward Caton]. https://collections.library.yale.edu/catalog/2026926.