MLA

The Modern Hercules, or, A Finishing Blow for Poor John Bull [Graphic]. Pub. Nov. 17, 1795, by S.W. Fores, No. 50 Piccadilly, the corner of Sackville Street, 0AD. https://collections.library.yale.edu/catalog/11105896.

APA, 6th edition

The modern Hercules, or, A finishing blow for poor John Bull [graphic]. (0 C.E.). [Caricatures and cartoons, Satires (Visual works) England 1795, Etchings England London 1795, Watermarks (Paper) J Whatman, Publishers' advertisements England London 1795]. Pub. Nov. 17, 1795, by S.W. Fores, No. 50 Piccadilly, the corner of Sackville Street. https://collections.library.yale.edu/catalog/11105896.