MLA

Royal Gambols!!, or, The Old Oak in Danger [Graphic]. Published September 1820 by John Fairburn, Broadway, Ludgate Hill, 0AD. https://collections.library.yale.edu/catalog/33245776.

APA, 6th edition

Royal gambols!!, or, The old oak in danger [graphic]. (0 C.E.). [Caricatures and cartoons, Satires (Visual works) England 1820, Etchings England London 1820, Annotations (Provenance) 19th century]. Published September 1820 by John Fairburn, Broadway, Ludgate Hill. https://collections.library.yale.edu/catalog/33245776.