MLA

Ionathan Boyer [Graphic]. Ionathan Boyer, 1726. https://collections.library.yale.edu/catalog/16830893.

APA, 6th edition

Ionathan Boyer [graphic]. (1726). [Advertisements, Trade cards (advertising), Ephemera, Engravings England London 1726]. Ionathan Boyer. https://collections.library.yale.edu/catalog/16830893.