MLA

Nicholls, Norton, 1741?-1809. Mary Nicholls to Jane Floyer Nicholls. Ditchleys. Concerns family. Box 2, folder 140. 1772 Mar 16. https://collections.library.yale.edu/catalog/17439937.

APA, 6th edition

Nicholls, Norton, 1741?-1809. (["Box 2, folder 140"])(1772 Mar 16)[Mary Nicholls to Jane Floyer Nicholls. Ditchleys. Concerns family]. https://collections.library.yale.edu/catalog/17439937.