MLA

Thayer, Scofield, 1889-1982. Orr, Elaine. Box 37, folder 1029-1033. 1921-26, n.d.. https://collections.library.yale.edu/catalog/17142319.

APA, 6th edition

Thayer, Scofield, 1889-1982. (["Box 37, folder 1029-1033"])(1921-26, n.d.)[Orr, Elaine]. https://collections.library.yale.edu/catalog/17142319.