MLA

Richard Coeur De Diable!! [Graphic]. Published October 1820 by John Fairburn, Broadway, Ludgate Hill, 0AD. https://collections.library.yale.edu/catalog/33245621.

APA, 6th edition

Richard coeur de diable!! [graphic]. (0 C.E.). [Caricatures and cartoons, Cartoons (Commentary) British 1820, Satires (Visual works) England 1820, Etchings England London 1820, Annotations (Provenance) 19th century]. Published October 1820 by John Fairburn, Broadway, Ludgate Hill. https://collections.library.yale.edu/catalog/33245621.