Cite

"Sea Horses" (5 prints, 1 proof)

MLA

Dreier, Katherine S. (Katherine Sophie), 1877-1952. "Sea Horses" (5 prints, 1 proof). Box 71, folder 1847. n.d.. https://collections.library.yale.edu/catalog/17047961.

APA, 6th edition

Dreier, Katherine S. (Katherine Sophie), 1877-1952. (["Box 71, folder 1847"])(n.d.)["Sea Horses" (5 prints, 1 proof)]. https://collections.library.yale.edu/catalog/17047961.