MLA

Van Vechten, Carl, 1880-1964. As Thousands Cheer, musical revue by with music and lyrics by Irving Berlin and book by Moss Hart. Waters, Ethel, singing "To Be Or Not To Be" with Hamtree Harrington during a performance at the Music Box Theatre. Box 110 | Folder 2055. 1933 September 12. https://collections.library.yale.edu/catalog/2028503.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 110 | Folder 2055"])(1933 September 12)[As Thousands Cheer, musical revue by with music and lyrics by Irving Berlin and book by Moss Hart. Waters, Ethel, singing "To Be Or Not To Be" with Hamtree Harrington during a performance at the Music Box Theatre]. https://collections.library.yale.edu/catalog/2028503.