MLA

Iohn Ward, Bookseller, at the Kings Arms in Cornhill, against the Royal Exchange, London ... [Graphic]. Iohn Ward, 0AD. https://collections.library.yale.edu/catalog/16830587.

APA, 6th edition

Iohn Ward, bookseller, at the Kings Arms in Cornhill, against the Royal Exchange, London ... [graphic]. (0 C.E.). [Advertisements, Trade cards (advertising), Ephemera, Engravings England London 1757]. Iohn Ward. https://collections.library.yale.edu/catalog/16830587.