MLA

Van Vechten, Carl, 1880-1964. Dolin, Anton, as Beau Gosse, in Le Train Bleu, choreographed by Bronislava Nijinska. Box 344, folder 4474. 1940 October 22. https://collections.library.yale.edu/catalog/2032974.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 344, folder 4474"])(1940 October 22)[Dolin, Anton, as Beau Gosse, in Le Train Bleu, choreographed by Bronislava Nijinska]. https://collections.library.yale.edu/catalog/2032974.