MLA

Thayer, Scofield, 1889-1982. Dewey, John. Box 30, folder 802. 1918. https://collections.library.yale.edu/catalog/17251473.

APA, 6th edition

Thayer, Scofield, 1889-1982. (["Box 30, folder 802"])(1918)[Dewey, John]. https://collections.library.yale.edu/catalog/17251473.