MLA

The Eloping Nun of Hampstead The Benedictine Monk. [Graphic]. Publish'd 20 Jan. 1791, by A. Hamilton Junr., Fleet Street, 0AD. https://collections.library.yale.edu/catalog/10732524.

APA, 6th edition

The eloping nun of Hampstead The Benedictine monk. [graphic]. (0 C.E.). [Portrait prints, Periodical illustrations, Etchings England London 1791, Stipple engravings England London 1791]. Publish'd 20 Jan. 1791, by A. Hamilton Junr., Fleet Street. https://collections.library.yale.edu/catalog/10732524.