MLA

Thayer, Scofield, 1889-1982. Strand, Paul. Box 7, folder 240. 1923. https://collections.library.yale.edu/catalog/17142287.

APA, 6th edition

Thayer, Scofield, 1889-1982. (["Box 7, folder 240"])(1923)[Strand, Paul]. https://collections.library.yale.edu/catalog/17142287.