MLA

John Bulls Alternative [Graphic]. M. Darly, 0AD. https://collections.library.yale.edu/catalog/16737555.

APA, 6th edition

John Bulls alternative [graphic]. (0 C.E.). [Caricatures and cartoons, Satires (Visual works) England 1781, Etchings England London 1781]. M. Darly. https://collections.library.yale.edu/catalog/16737555.