MLA

Scrub & Bonniface, or, Three Brave Lads against One Poor Roscius [Graphic]. Pubd. Augt. 9 by Steine Briton, 0AD. https://collections.library.yale.edu/catalog/10731299.

APA, 6th edition

Scrub & Bonniface, or, Three brave lads against one poor Roscius [graphic]. (0 C.E.). [Caricatures and cartoons, Satires (Visual works) England 1790, Etchings England London 1790]. Pubd. Augt. 9 by Steine Briton. https://collections.library.yale.edu/catalog/10731299.