MLA

Certain Petitioners Requesting Master to Discharge His Servants [Graphic]. publisher not identified, 0AD. https://collections.library.yale.edu/catalog/10713420.

APA, 6th edition

Certain petitioners requesting master to discharge his servants [graphic]. (0 C.E.). [Caricatures and cartoons, Satires (Visual works) England 1769, Etchings England London 1769, Periodical illustrations England 1769]. publisher not identified. https://collections.library.yale.edu/catalog/10713420.