MLA

Gregory, Alyse, 1882-1967. Gregory, Alyse. Box 65, folder 1079. n.d.. https://collections.library.yale.edu/catalog/2003258.

APA, 6th edition

Gregory, Alyse, 1882-1967. (["Box 65, folder 1079"])(n.d.)[Gregory, Alyse]. https://collections.library.yale.edu/catalog/2003258.