MLA

Toomer, Jean, 1894-1967. Publicity. Box 35, folder 751. n.d.. https://collections.library.yale.edu/catalog/16725521.

APA, 6th edition

Toomer, Jean, 1894-1967. (["Box 35, folder 751"])(n.d.)[Publicity]. https://collections.library.yale.edu/catalog/16725521.