MLA

Hughes, Langston, 1902-1967. Richmond, Mignon. Box 136, folder 2542-2543. 1945-67, n.d.. https://collections.library.yale.edu/catalog/32469191.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 136, folder 2542-2543"])(1945-67, n.d.)[Richmond, Mignon]. https://collections.library.yale.edu/catalog/32469191.