MLA

Hughes, Langston, 1902-1967. Peterson, Jerome Bowers; Peterson, Cornelia White. Box 8 (Oversize), folder 98. 1893-1908, undated. https://collections.library.yale.edu/catalog/16198546.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 8 (Oversize), folder 98"])(1893-1908, undated)[Peterson, Jerome Bowers; Peterson, Cornelia White]. https://collections.library.yale.edu/catalog/16198546.