MLA

The Duel , or, Sir Dicky Dab Thro' and Thro' the Captain [Graphic]. Pub'd , by S.W. Fores Jany. the 20, 1787 at the Caricature Ware-house, No.3 Piccadilly, 0AD. https://collections.library.yale.edu/catalog/10728253.

APA, 6th edition

The duel , or, Sir Dicky Dab thro' and thro' the Captain [graphic]. (0 C.E.). [Satires (Visual works) England 1787, Etchings England London 1787]. Pub'd , by S.W. Fores Jany. the 20, 1787 at the Caricature Ware-house, No.3 Piccadilly. https://collections.library.yale.edu/catalog/10728253.