MLA

The Captive Prince, or, Liberty Run Mad [Graphic]. Pubd. 23d [April?] 1782 by Eliz. D'Achery, St. James's Street, 0AD. https://collections.library.yale.edu/catalog/11810249.

APA, 6th edition

The captive prince, or, Liberty run mad [graphic]. (0 C.E.). [Caricatures and cartoons, Satires (Visual works) England 1782, Etchings England London 1782]. Pubd. 23d [April?] 1782 by Eliz. D'Achery, St. James's Street. https://collections.library.yale.edu/catalog/11810249.