MLA

The Rival Quacks [Graphic]. Pubd. as [the] Act directs Feby 2, 1784 by B. Walwyn No. 2 Pedlars Acre West Bridge, 0AD. https://collections.library.yale.edu/catalog/10727397.

APA, 6th edition

The rival quacks [graphic]. (0 C.E.). [Satires (Visual works) England 1784, Etchings England London 1784]. Pubd. as [the] Act directs Feby 2, 1784 by B. Walwyn No. 2 Pedlars Acre West Bridge. https://collections.library.yale.edu/catalog/10727397.