MLA

Lynes, George Platt, 1907-1955. Datebook. Box 2, folder 8. 1946. https://collections.library.yale.edu/catalog/17156215.

APA, 6th edition

Lynes, George Platt, 1907-1955. (["Box 2, folder 8"])(1946)[Datebook]. https://collections.library.yale.edu/catalog/17156215.