MLA

Van Vechten, Carl, 1880-1964. Barclift, E. Nelson, wearing a run up costume in This Is the Army, musical with music by Irving Berlin and book by Irving Berlin and James McColl. Box 334, folder 4190. 1942 August 6. https://collections.library.yale.edu/catalog/2031374.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 334, folder 4190"])(1942 August 6)[Barclift, E. Nelson, wearing a run up costume 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/2031374.