MLA

Dreier, Katherine S. (Katherine Sophie), 1877-1952. College Art Association of America. Box 9, folder 242. 1932-48. https://collections.library.yale.edu/catalog/16694410.

APA, 6th edition

Dreier, Katherine S. (Katherine Sophie), 1877-1952. (["Box 9, folder 242"])(1932-48)[College Art Association of America]. https://collections.library.yale.edu/catalog/16694410.