MLA

Dreier, Katherine S. (Katherine Sophie), 1877-1952. "The Invisible Line," typescript, corrected. Box 42, folder 1241. n.d.. https://collections.library.yale.edu/catalog/16694436.

APA, 6th edition

Dreier, Katherine S. (Katherine Sophie), 1877-1952. (["Box 42, folder 1241"])(n.d.)["The Invisible Line," typescript, corrected]. https://collections.library.yale.edu/catalog/16694436.