MLA

A Sketch from the Ruins of Fonthill [Graphic]. Pubd. Octr. 1826 by G. Humphreys, 24 St. James St., 0AD. https://collections.library.yale.edu/catalog/15816344.

APA, 6th edition

A sketch from the ruins of Fonthill [graphic]. (0 C.E.). [Caricatures and cartoons, Satires (Visual works) England 1826, Etchings England London 1826]. Pubd. Octr. 1826 by G. Humphreys, 24 St. James St. https://collections.library.yale.edu/catalog/15816344.