MLA

Hughes, Langston, 1902-1967. Schuyler, Philippa Duke. Box 10 (Oversize), folder 116-117. 1945-1954. https://collections.library.yale.edu/catalog/16198556.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 10 (Oversize), folder 116-117"])(1945-1954)[Schuyler, Philippa Duke]. https://collections.library.yale.edu/catalog/16198556.