MLA

Hughes, Langston, 1902-1967. Haiti. Box 586, folder 13995. n.d.. https://collections.library.yale.edu/catalog/2057512.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 586, folder 13995"])(n.d.)[Haiti]. https://collections.library.yale.edu/catalog/2057512.