MLA

Van Vechten, Carl, 1880-1964. Webb, Clifton, during a performance of Flying Colors, musical revue by Arthur Schwartz and Howard Dietz at Forrest Theatre, Philadelphia, Pennsylvania. Box 385, folder 5761. 1932 September 5. https://collections.library.yale.edu/catalog/10632529.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 385, folder 5761"])(1932 September 5)[Webb, Clifton, during a performance of Flying Colors, musical revue by Arthur Schwartz and Howard Dietz at Forrest Theatre, Philadelphia, Pennsylvania]. https://collections.library.yale.edu/catalog/10632529.