MLA

Van Vechten, Carl, 1880-1964. Wyckoff, William "Stumpy", in This Is the Army, musical with music by Irving Berlin and book by Irving Berlin and James McColl. Box 109 | 2014-2015. 1942 August 11. https://collections.library.yale.edu/catalog/2028892.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 109 | 2014-2015"])(1942 August 11)[Wyckoff, William "Stumpy", in This Is the Army, musical with music by Irving Berlin and book by Irving Berlin and James McColl]. https://collections.library.yale.edu/catalog/2028892.