MLA

Toomer, Jean, 1894-1967. New Mexico. Box 70, folder 1580. 1936-38. https://collections.library.yale.edu/catalog/16725565.

APA, 6th edition

Toomer, Jean, 1894-1967. (["Box 70, folder 1580"])(1936-38)[New Mexico]. https://collections.library.yale.edu/catalog/16725565.