MLA

Stiles, Ezra, 1727-1795. Description of Dighton Rock, Massachusetts (MVP #435). Box 52, folder 2194. 1767 September 14. https://collections.library.yale.edu/catalog/16846389.

APA, 6th edition

Stiles, Ezra, 1727-1795. (["Box 52, folder 2194"])(1767 September 14)[Description of Dighton Rock, Massachusetts (MVP #435)]. https://collections.library.yale.edu/catalog/16846389.