MLA

Lady Pyebald The R-g-Te Amoroso. [Graphic]. Publish'd as the Act directs by A. Hamilton Junr. ..., 0AD. https://collections.library.yale.edu/catalog/10723016.

APA, 6th edition

Lady Pyebald The R-g-te amoroso. [graphic]. (0 C.E.). [Portrait prints, Periodical illustrations, Stipple engravings England London 1776, Engravings England London 1776, Etchings England London 1776]. Publish'd as the Act directs by A. Hamilton Junr. ... https://collections.library.yale.edu/catalog/10723016.