MLA

Hughes, Langston, 1902-1967. Script, mimeograph. Box 285, folder 4658. 1961 Nov. https://collections.library.yale.edu/catalog/32468551.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 285, folder 4658"])(1961 Nov)[Script, mimeograph]. https://collections.library.yale.edu/catalog/32468551.