MLA

Dreier, Katherine S. (Katherine Sophie), 1877-1952. "3 Standard Stoppages" (2 views, 3 prints). Box 73, folder 1897. n.d.. https://collections.library.yale.edu/catalog/2017787.

APA, 6th edition

Dreier, Katherine S. (Katherine Sophie), 1877-1952. (["Box 73, folder 1897"])(n.d.)["3 Standard Stoppages" (2 views, 3 prints)]. https://collections.library.yale.edu/catalog/2017787.