MLA

Savoyards of Fashion, or, The Musical Mania of 1799 [Graphic]. Pubd. April 24th, 1799, by S.W. Fores, 50 Piccadilly, 0AD. https://collections.library.yale.edu/catalog/10697351.

APA, 6th edition

Savoyards of fashion, or, The musical mania of 1799 [graphic]. (0 C.E.). [Caricatures and cartoons, Satires (Visual works) England 1799, Etchings England London 1799, Watermarks (Paper) Edmeades & Pine]. Pubd. April 24th, 1799, by S.W. Fores, 50 Piccadilly. https://collections.library.yale.edu/catalog/10697351.