MLA

Dreier, Katherine S. (Katherine Sophie), 1877-1952. Catalog; Exhibition brochure. Box 42, folder 1248. 1926. https://collections.library.yale.edu/catalog/17265853.

APA, 6th edition

Dreier, Katherine S. (Katherine Sophie), 1877-1952. (["Box 42, folder 1248"])(1926)[Catalog; Exhibition brochure]. https://collections.library.yale.edu/catalog/17265853.