MLA

Boadicea, Queen of Britain, Overthrowing Her Enemies Humbly Dedicated to Caroline, Queen of Great Britain and Ireland. [Graphic]. Published November 1820 by John Fairburn, Broadway, Ludgate Hill, London, 0AD. https://collections.library.yale.edu/catalog/33114433.

APA, 6th edition

Boadicea, Queen of Britain, overthrowing her enemies humbly dedicated to Caroline, Queen of Great Britain and Ireland. [graphic]. (0 C.E.). [Trials, litigation, etc, Caricatures and cartoons, In art, Satires (Visual works) England 1820, Etchings England London 1820, Watermarks (Paper) J Whatman 1820, Annotations (Provenance) 19th century]. Published November 1820 by John Fairburn, Broadway, Ludgate Hill, London. https://collections.library.yale.edu/catalog/33114433.