MLA

Lynes, George Platt, 1907-1955. Diary. Box 1, folder 5. 1943. https://collections.library.yale.edu/catalog/17156214.

APA, 6th edition

Lynes, George Platt, 1907-1955. (["Box 1, folder 5"])(1943)[Diary]. https://collections.library.yale.edu/catalog/17156214.