MLA

Toomer, Jean, 1894-1967. "Winter": typescripts. Box 67, folder 1534. 1928 Apr 3. https://collections.library.yale.edu/catalog/16725560.

APA, 6th edition

Toomer, Jean, 1894-1967. (["Box 67, folder 1534"])(1928 Apr 3)["Winter": typescripts]. https://collections.library.yale.edu/catalog/16725560.