MLA

Madam Marie De Vichi Marquis Du Deffand from a Drawing Aat [Sic] Strawberry Hill. [Graphic]. Publd. Novr. 12 by S. Harding, 127 Pall Mall, 0AD. https://collections.library.yale.edu/catalog/16729671.

APA, 6th edition

Madam Marie de Vichi Marquis du Deffand from a drawing aat [sic] Strawberry Hill. [graphic]. (0 C.E.). [Portrait prints, Etchings England London 1798]. Publd. Novr. 12 by S. Harding, 127 Pall Mall. https://collections.library.yale.edu/catalog/16729671.