MLA

Upright Billy Alias Orator Humbug [Graphic]. Publishd Decr. 30th 1788 by H. Humphry, Bond Street, 0AD. https://collections.library.yale.edu/catalog/10731053.

APA, 6th edition

Upright Billy alias Orator Humbug [graphic]. (0 C.E.). [Caricatures and cartoons, Satires (Visual works) England 1788, Etchings England London 1788, Watermarks (Paper), Annotations (Provenance)]. Publishd Decr. 30th 1788 by H. Humphry, Bond Street. https://collections.library.yale.edu/catalog/10731053.