MLA

The Political Platonic Lovers [Graphic]. Published as the Act directs by A. Hamilton Junr. ..., 0AD. https://collections.library.yale.edu/catalog/10723070.

APA, 6th edition

The political platonic lovers [graphic]. (0 C.E.). [Portrait prints, Periodical illustrations, Stipple engravings England London 1777, Engravings England London 1777, Etchings England London 1777]. Published as the Act directs by A. Hamilton Junr. ... https://collections.library.yale.edu/catalog/10723070.