MLA

Thayer, Scofield, 1889-1982. Illustrations. Box 70, folder 1913-1933. n.d.. https://collections.library.yale.edu/catalog/16723916.

APA, 6th edition

Thayer, Scofield, 1889-1982. (["Box 70, folder 1913-1933"])(n.d.)[Illustrations]. https://collections.library.yale.edu/catalog/16723916.