MLA

Williams, Edward, and printmaker the Elder. [Polygamy] [Graphic]. publisher not identified, 0AD. https://collections.library.yale.edu/catalog/10727472.

APA, 6th edition

Williams, E., & the Elder, printmaker. (0 C.E.). [Polygamy] [graphic] [Satires (Visual works) England 1785, Etchings England London 1785]. publisher not identified. https://collections.library.yale.edu/catalog/10727472.