MLA

The Convenience of Two Doors [Graphic]. Published 21st April 1786, by S.W. Fores, at the Caricature Warehouse, No. 3, Piccadilly, 0AD. https://collections.library.yale.edu/catalog/11791322.

APA, 6th edition

The convenience of two doors [graphic]. (0 C.E.). [Satires (Visual works) England 1786, Stipple engravings England London 1786]. Published 21st April 1786, by S.W. Fores, at the Caricature Warehouse, No. 3, Piccadilly. https://collections.library.yale.edu/catalog/11791322.