MLA

Whessell, John, active 1760-1797, printmaker. Welbore Ellis Lord Mendip sometime one of his Majesty's principal Secretaries of State, Secretary at War, Treasurer of the Navy, Joint Vice Treasurer of the Kingdom of Ireland &c. &c. &c. / [graphic]. [1763]. https://collections.library.yale.edu/catalog/10985124.

APA, 6th edition

Whessell, John, active 1760-1797, printmaker. ([1763])[Welbore Ellis Lord Mendip sometime one of his Majesty's principal Secretaries of State, Secretary at War, Treasurer of the Navy, Joint Vice Treasurer of the Kingdom of Ireland &c. &c. &c. / [graphic]]. https://collections.library.yale.edu/catalog/10985124.