Cite

Box 12, folders 317-320

MLA

Dreier, Katherine S. (Katherine Sophie), 1877-1952. Box 12, folders 317-320. Box 134, folder 2970. 1818 1952. https://collections.library.yale.edu/catalog/2014480.

APA, 6th edition

Dreier, Katherine S. (Katherine Sophie), 1877-1952. (["Box 134, folder 2970"])(1818 1952)[Box 12, folders 317-320]. https://collections.library.yale.edu/catalog/2014480.