MLA

Van Vechten, Carl, 1880-1964. Hatfield, Hurd, as A Romantic Poet, in Camino Real, by Tennessee Williams. Box 352, folder 4737. 1953 April 21. https://collections.library.yale.edu/catalog/2036499.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 352, folder 4737"])(1953 April 21)[Hatfield, Hurd, as A Romantic Poet, in Camino Real, by Tennessee Williams]. https://collections.library.yale.edu/catalog/2036499.