MLA

Hughes, Langston, 1902-1967. Schuyler, George. Box 143, folder 2663. 1925-63. https://collections.library.yale.edu/catalog/17020461.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 143, folder 2663"])(1925-63)[Schuyler, George]. https://collections.library.yale.edu/catalog/17020461.