MLA

Toomer, Jean, 1894-1967. Frank, Waldo. Holiday. Box 57, folder 1317. [1923?]. https://collections.library.yale.edu/catalog/16725550.

APA, 6th edition

Toomer, Jean, 1894-1967. (["Box 57, folder 1317"])([1923?])[Frank, Waldo. Holiday]. https://collections.library.yale.edu/catalog/16725550.