MLA

Hughes, Langston, 1902-1967. Adamic, Louis. Box 2, folder 27. 1932. https://collections.library.yale.edu/catalog/32604348.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 2, folder 27"])(1932)[Adamic, Louis]. https://collections.library.yale.edu/catalog/32604348.