MLA

Luhan, Mabel Dodge, 1879-1962. Native American Indians. Box 65, folder 1769-1770. n.d.. https://collections.library.yale.edu/catalog/10268285.

APA, 6th edition

Luhan, Mabel Dodge, 1879-1962. (["Box 65, folder 1769-1770"])(n.d.)[Native American Indians]. https://collections.library.yale.edu/catalog/10268285.