MLA

An Amusing State of Uncertainty, Peace or War!! [Graphic]. Pubd. June 20, 1791, by Wm. Holland, No. 50 Oxford St., 0AD. https://collections.library.yale.edu/catalog/10732596.

APA, 6th edition

An amusing state of uncertainty, peace or war!! [graphic]. (0 C.E.). [Caricatures and cartoons, Satires (Visual works) England 1791, Etchings England London 1791]. Pubd. June 20, 1791, by Wm. Holland, No. 50 Oxford St. https://collections.library.yale.edu/catalog/10732596.