MLA

Thistlewood, Thomas, 1721-1786. 33. Diary. Box 6, folder 33. 1782. https://collections.library.yale.edu/catalog/12030322.

APA, 6th edition

Thistlewood, Thomas, 1721-1786. (["Box 6, folder 33"])(1782)[33. Diary]. https://collections.library.yale.edu/catalog/12030322.