MLA

Observations on the Times [Graphic]. publisher not identified, 0AD. https://collections.library.yale.edu/catalog/16034764.

APA, 6th edition

Observations on the times [graphic]. (0 C.E.). [Caricatures and cartoons, Humor, Satires (Visual works) England 1762, Etchings England London 1762, Broadsides England London 1762]. publisher not identified. https://collections.library.yale.edu/catalog/16034764.