MLA

Dreier, Katherine S. (Katherine Sophie), 1877-1952. With watercolor, untitled, and clippings pasted in, surrounded by watercolor. Box 76, folder 1965. 1926. https://collections.library.yale.edu/catalog/32209516.

APA, 6th edition

Dreier, Katherine S. (Katherine Sophie), 1877-1952. (["Box 76, folder 1965"])(1926)[With watercolor, untitled, and clippings pasted in, surrounded by watercolor]. https://collections.library.yale.edu/catalog/32209516.