MLA

Hughes, Langston, 1902-1967. Lucas, Radcliffe. Box 469, folder 11579. 1932, n.d.. https://collections.library.yale.edu/catalog/33548797.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 469, folder 11579"])(1932, n.d.)[Lucas, Radcliffe]. https://collections.library.yale.edu/catalog/33548797.