MLA

Nicholls, Norton, 1741?-1809. Norton Nicholls to Jane Floyer Nicholls. Enfield. Concerns Enfield School; family. Box 1, folder 10. 1755 Apr 19. https://collections.library.yale.edu/catalog/17439807.

APA, 6th edition

Nicholls, Norton, 1741?-1809. (["Box 1, folder 10"])(1755 Apr 19)[Norton Nicholls to Jane Floyer Nicholls. Enfield. Concerns Enfield School; family]. https://collections.library.yale.edu/catalog/17439807.