MLA

Hughes, Langston, 1902-1967. Robeson, Paul. Box 9(Oversize), folder 104-112. 1925-1936, undated. https://collections.library.yale.edu/catalog/16198552.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 9(Oversize), folder 104-112"])(1925-1936, undated)[Robeson, Paul]. https://collections.library.yale.edu/catalog/16198552.