MLA

Hughes, Langston, 1902-1967. Coleridge-Taylor, Samuel. Box 19, folder 246. 1875-1978. https://collections.library.yale.edu/catalog/16207028.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 19, folder 246"])(1875-1978)[Coleridge-Taylor, Samuel]. https://collections.library.yale.edu/catalog/16207028.