MLA

Thayer, Scofield, 1889-1982. Rosenberg, Paul. Box 39, folder 1098. 1923-24. https://collections.library.yale.edu/catalog/17251475.

APA, 6th edition

Thayer, Scofield, 1889-1982. (["Box 39, folder 1098"])(1923-24)[Rosenberg, Paul]. https://collections.library.yale.edu/catalog/17251475.