MLA

Van Vechten, Carl, 1880-1964. Rahn, Muriel, as Cora Lewis in The Barrier, musical with music by Jan Meyerowitz and book and lyrics by Langston Hughes. Box 223. 1950 January 29. https://collections.library.yale.edu/catalog/2019501.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 223"])(1950 January 29)[Rahn, Muriel, as Cora Lewis in The Barrier, musical with music by Jan Meyerowitz and book and lyrics by Langston Hughes]. https://collections.library.yale.edu/catalog/2019501.