MLA

Hughes, Langston, 1902-1967. Thompson, Louise. Box 155, folder 2872-2874. 1930-61, n.d.. https://collections.library.yale.edu/catalog/32180500.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 155, folder 2872-2874"])(1930-61, n.d.)[Thompson, Louise]. https://collections.library.yale.edu/catalog/32180500.