MLA

Hughes, Langston, 1902-1967. "A" General. Box 1, folder 1-10. ca. 1920s-60s. https://collections.library.yale.edu/catalog/32583887.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 1, folder 1-10"])(ca. 1920s-60s)["A" General]. https://collections.library.yale.edu/catalog/32583887.