MLA

Van Vechten, Carl, 1880-1964. Price, Vincent, as The Unknown Prince (Calaf), and Anna May Wong, as Princess Turandot, in Turandot, an opera by Giacomo Puccini and Franco Alfano at the Westport Country Playhouse, Westport, Connecticut. Box 431, folder 6941. 1937 August 11. https://collections.library.yale.edu/catalog/33266497.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 431, folder 6941"])(1937 August 11)[Price, Vincent, as The Unknown Prince (Calaf), and Anna May Wong, as Princess Turandot, in Turandot, an opera by Giacomo Puccini and Franco Alfano at the Westport Country Playhouse, Westport, Connecticut]. https://collections.library.yale.edu/catalog/33266497.