MLA

The Auction, or, Modern Conoisseurs [Sic] [Graphic]. publisher not identified, 0AD. https://collections.library.yale.edu/catalog/10715783.

APA, 6th edition

The auction, or, Modern conoisseurs [sic] [graphic]. (0 C.E.). [Caricatures and cartoons, Satires (Visual works) England 1771, Periodical illustrations, Etchings England London 1771]. publisher not identified. https://collections.library.yale.edu/catalog/10715783.