MLA

Hughes, Langston, 1902-1967. Rice, Elmer. Box 136, folder 2535-2536. 1934-67, n.d.. https://collections.library.yale.edu/catalog/32468860.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 136, folder 2535-2536"])(1934-67, n.d.)[Rice, Elmer]. https://collections.library.yale.edu/catalog/32468860.