MLA

Nicholls, Norton, 1741?-1809. Norton Nicholls to Jane Floyer Nicholls. Marseilles. Concerns Marseilles; France. Box 2, folder 185. 1773 Jan 11. https://collections.library.yale.edu/catalog/17439982.

APA, 6th edition

Nicholls, Norton, 1741?-1809. (["Box 2, folder 185"])(1773 Jan 11)[Norton Nicholls to Jane Floyer Nicholls. Marseilles. Concerns Marseilles; France]. https://collections.library.yale.edu/catalog/17439982.