MLA

Thayer, Scofield, 1889-1982. Max Hevesi. Box 69, folder 1867. 1923. https://collections.library.yale.edu/catalog/17142342.

APA, 6th edition

Thayer, Scofield, 1889-1982. (["Box 69, folder 1867"])(1923)[Max Hevesi]. https://collections.library.yale.edu/catalog/17142342.