MLA

Dreier, Katherine S. (Katherine Sophie), 1877-1952. [International Exhibition of Modern Art (1926-1927: Brooklyn Museum)], typescript carbon. Box 46, folder 1367. 1926 Nov 20. https://collections.library.yale.edu/catalog/10081329.

APA, 6th edition

Dreier, Katherine S. (Katherine Sophie), 1877-1952. (["Box 46, folder 1367"])(1926 Nov 20)[[International Exhibition of Modern Art (1926-1927: Brooklyn Museum)], typescript carbon]. https://collections.library.yale.edu/catalog/10081329.