MLA

Wilfred, Thomas, 1889-1968. Writings. Box 12, folder 180-181. 1923-1942. https://collections.library.yale.edu/catalog/33511083.

APA, 6th edition

Wilfred, Thomas, 1889-1968. (["Box 12, folder 180-181"])(1923-1942)[Writings]. https://collections.library.yale.edu/catalog/33511083.