MLA

Toomer, Jean, 1894-1967. Third draft. Box 27, folder 623-26. n.d.. https://collections.library.yale.edu/catalog/16725517.

APA, 6th edition

Toomer, Jean, 1894-1967. (["Box 27, folder 623-26"])(n.d.)[Third draft]. https://collections.library.yale.edu/catalog/16725517.