MLA

Miss Betsy Wil-x The Inflexible Patriot. [Graphic]. A. Hamilton, Jr., 0AD. https://collections.library.yale.edu/catalog/10715979.

APA, 6th edition

Miss Betsy Wil-x The inflexible patriot. [graphic]. (0 C.E.). [Portrait prints, Periodical illustrations, Stipple engravings England London 1772, Etchings England London 1772]. A. Hamilton, Jr. https://collections.library.yale.edu/catalog/10715979.