MLA

St. George and the Dragon, or, The Glorious Aera of 1798 [Graphic]. Pub. Decr. 5, 1798 by S.W. Fores, No. 50 Piccadilly, corner of Sachville [sic] St, 0AD. https://collections.library.yale.edu/catalog/10941262.

APA, 6th edition

St. George and the dragon, or, The glorious aera of 1798 [graphic]. (0 C.E.). [Caricatures and cartoons, Satires (Visual works) England 1798, Etchings England London 1798, Watermarks (Paper) 1797, Annotations (Provenance) 18th century]. Pub. Decr. 5, 1798 by S.W. Fores, No. 50 Piccadilly, corner of Sachville [sic] St. https://collections.library.yale.edu/catalog/10941262.