MLA

Hughes, Langston, 1902-1967. Dustan, Gertrude Louise. Box 19, folder 254. 1895. https://collections.library.yale.edu/catalog/16207035.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 19, folder 254"])(1895)[Dustan, Gertrude Louise]. https://collections.library.yale.edu/catalog/16207035.