MLA

Hughes, Langston, 1902-1967. Stearns, Marshall. Box 150, folder 2790. 1945-65. https://collections.library.yale.edu/catalog/17020471.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 150, folder 2790"])(1945-65)[Stearns, Marshall]. https://collections.library.yale.edu/catalog/17020471.