MLA

Thistlewood, Thomas, 1721-1786. 27. Diary. Box 5, folder 27. 1776. https://collections.library.yale.edu/catalog/11872839.

APA, 6th edition

Thistlewood, Thomas, 1721-1786. (["Box 5, folder 27"])(1776)[27. Diary]. https://collections.library.yale.edu/catalog/11872839.