MLA

Hughes, Langston, 1902-1967. Hurston, Zora Neale. Box 82, folder 1587-1589. 1927-30, n.d.. https://collections.library.yale.edu/catalog/33087973.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 82, folder 1587-1589"])(1927-30, n.d.)[Hurston, Zora Neale]. https://collections.library.yale.edu/catalog/33087973.