MLA

A Tom Tit Twittering on an Eagle's Back-Side [Graphic]. Published 19th April 1786 by S.W. Fores, at the Caricature Warehouse, No. 3 Piccadilly, 0AD. https://collections.library.yale.edu/catalog/33189832.

APA, 6th edition

A tom tit twittering on an eagle's back-side [graphic]. (0 C.E.). [Illustrations, Caricatures and cartoons, Etchings, Satires (Visual works) England 1786, Etchings England London 1786, Watermarks (Paper)]. Published 19th April 1786 by S.W. Fores, at the Caricature Warehouse, No. 3 Piccadilly. https://collections.library.yale.edu/catalog/33189832.