MLA

Hughes, Langston, 1902-1967. Unidentified places. Box 22, folder 343. 1875-1978. https://collections.library.yale.edu/catalog/16207116.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 22, folder 343"])(1875-1978)[Unidentified places]. https://collections.library.yale.edu/catalog/16207116.