MLA

Nicholls, Norton, 1741?-1809. John Minifie to Norton Nicholls. Trezzo. Concerns Milanese court; Count Charles Firmian. Box 2, folder 208. 1773 Dec 9. https://collections.library.yale.edu/catalog/17440005.

APA, 6th edition

Nicholls, Norton, 1741?-1809. (["Box 2, folder 208"])(1773 Dec 9)[John Minifie to Norton Nicholls. Trezzo. Concerns Milanese court; Count Charles Firmian]. https://collections.library.yale.edu/catalog/17440005.