MLA

Lynes, George Platt, 1907-1955. Datebook. Box 2, folder 17. 1954. https://collections.library.yale.edu/catalog/17422360.

APA, 6th edition

Lynes, George Platt, 1907-1955. (["Box 2, folder 17"])(1954)[Datebook]. https://collections.library.yale.edu/catalog/17422360.