MLA

Van Vechten, Carl, 1880-1964. Cohan, Robert, as the Ring Master, in Every Soul Is a Circus, choreographed by Martha Graham. Box 341 | Folder 4400. 1955 May 17. https://collections.library.yale.edu/catalog/2032037.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 341 | Folder 4400"])(1955 May 17)[Cohan, Robert, as the Ring Master, in Every Soul Is a Circus, choreographed by Martha Graham]. https://collections.library.yale.edu/catalog/2032037.