MLA

Thistlewood, Thomas, 1721-1786. 77. Reading notes. Box 12, folder 90. undated. https://collections.library.yale.edu/catalog/12210751.

APA, 6th edition

Thistlewood, Thomas, 1721-1786. (["Box 12, folder 90"])(undated)[77. Reading notes]. https://collections.library.yale.edu/catalog/12210751.