MLA

The Frolick, or, A New-Market Race [Graphic]. Pub. July 11, 1788, by S.W. Fores, No. 3 Picadilly, 0AD. https://collections.library.yale.edu/catalog/10728489.

APA, 6th edition

The frolick, or, A new-market race [graphic]. (0 C.E.). [Caricatures and cartoons, Satires (Visual works) England 1788, Etchings England London 1788, Watermarks (Paper).]. Pub. July 11, 1788, by S.W. Fores, No. 3 Picadilly. https://collections.library.yale.edu/catalog/10728489.