MLA

Kimball, Chase, 1902-. General. Box 2, folder 14-16. 1931-1937, undated. https://collections.library.yale.edu/catalog/10014819.

APA, 6th edition

Kimball, Chase, 1902-. (["Box 2, folder 14-16"])(1931-1937, undated)[General]. https://collections.library.yale.edu/catalog/10014819.