MLA

Toomer, Jean, 1894-1967. Typescript, carbon: 2 copies. Box 44, folder 918-19. n.d.. https://collections.library.yale.edu/catalog/16725530.

APA, 6th edition

Toomer, Jean, 1894-1967. (["Box 44, folder 918-19"])(n.d.)[Typescript, carbon: 2 copies]. https://collections.library.yale.edu/catalog/16725530.