MLA

French, Jared, 1905-1988. Lynes, George Platt. Box 3, folder 62. 1943-1955, undated. https://collections.library.yale.edu/catalog/31444580.

APA, 6th edition

French, Jared, 1905-1988. (["Box 3, folder 62"])(1943-1955, undated)[Lynes, George Platt]. https://collections.library.yale.edu/catalog/31444580.