MLA

Political Whisper [Graphic]. Printed & published as the act directs, Octr. 20, 1785, by W. Hinton, copper plate printer, No. 5 Sweetings Alley, Royal Exchange, engraving and printing in general, 0AD. https://collections.library.yale.edu/catalog/10728029.

APA, 6th edition

Political whisper [graphic]. (0 C.E.). [Satires (Visual works) England 1785, Etchings England London 1785]. Printed & published as the act directs, Octr. 20, 1785, by W. Hinton, copper plate printer, No. 5 Sweetings Alley, Royal Exchange, engraving and printing in general. https://collections.library.yale.edu/catalog/10728029.