MLA

Nicholls, Norton, 1741?-1809. Norton Nicholls to Jane Floyer Nicholls. Ditchley Park. Concerns Cambridge University. Box 1, folder 40. 1764 Jun 13. https://collections.library.yale.edu/catalog/17439837.

APA, 6th edition

Nicholls, Norton, 1741?-1809. (["Box 1, folder 40"])(1764 Jun 13)[Norton Nicholls to Jane Floyer Nicholls. Ditchley Park. Concerns Cambridge University]. https://collections.library.yale.edu/catalog/17439837.