MLA

Thayer, Scofield, 1889-1982. Unidentified typescript. Box 70, folder 1912. n.d.. https://collections.library.yale.edu/catalog/17142343.

APA, 6th edition

Thayer, Scofield, 1889-1982. (["Box 70, folder 1912"])(n.d.)[Unidentified typescript]. https://collections.library.yale.edu/catalog/17142343.