MLA

The Connoiseurs [Graphic]. Pubd. according to act of Parlt., Sepr. 1st 1771, by MDarly, Engraver, 39 Strand, 0AD. https://collections.library.yale.edu/catalog/15949991.

APA, 6th edition

The connoiseurs [graphic]. (0 C.E.). [Caricatures and cartoons, Satires (Visual works) England 1771, Etchings England London 1771, Watermarks (Paper)]. Pubd. according to act of Parlt., Sepr. 1st 1771, by MDarly, Engraver, 39 Strand. https://collections.library.yale.edu/catalog/15949991.