MLA

Van Vechten, Carl, 1880-1964. Gibson, Ian Wallace, in the Bluebird Pas de Deux in Princess Aurora (a suite of divertissements from The Sleeping Beauty), choreographed by Anton Dolin after Marius Petipa. Box 349, folder 4650. 1941 December 9. https://collections.library.yale.edu/catalog/33340051.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 349, folder 4650"])(1941 December 9)[Gibson, Ian Wallace, in the Bluebird Pas de Deux in Princess Aurora (a suite of divertissements from The Sleeping Beauty), choreographed by Anton Dolin after Marius Petipa]. https://collections.library.yale.edu/catalog/33340051.