MLA

Charles the Third, King of All the Orkneys and Would Be Monarch of the East, or, The Effects of a Bad Conscience [Graphic]. Pubd. June 16th, 1784, as the act directs, by S. Fores, 3 Piccadilly, 0AD. https://collections.library.yale.edu/catalog/10727864.

APA, 6th edition

Charles the Third, King of all the Orkneys and would be monarch of the East, or, The effects of a bad conscience [graphic]. (0 C.E.). [Parodies, imitations, etc, Caricatures and cartoons, Satires (Visual works) England 1784, Etchings England London 1784, Stipple engravings England London 1784]. Pubd. June 16th, 1784, as the act directs, by S. Fores, 3 Piccadilly. https://collections.library.yale.edu/catalog/10727864.