MLA

Hughes, Langston, 1902-1967. Arden, Marjorie. Box 8, folder 174. 1935-41, n.d.. https://collections.library.yale.edu/catalog/33219329.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 8, folder 174"])(1935-41, n.d.)[Arden, Marjorie]. https://collections.library.yale.edu/catalog/33219329.