MLA

Hughes, Langston, 1902-1967. Ritchie, Martha. Box 8 (Oversize), folder 103. 1893-1954. https://collections.library.yale.edu/catalog/16198551.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 8 (Oversize), folder 103"])(1893-1954)[Ritchie, Martha]. https://collections.library.yale.edu/catalog/16198551.