MLA

Van Vechten, Carl, 1880-1964. Dolin, Anton, as Count Albrecht in Giselle, choreographed by Anton Dolin. Box 344, folder 4476. 1941 February 17. https://collections.library.yale.edu/catalog/2033030.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 344, folder 4476"])(1941 February 17)[Dolin, Anton, as Count Albrecht in Giselle, choreographed by Anton Dolin]. https://collections.library.yale.edu/catalog/2033030.