Cite

I. Corcoran, engraver of gems [graphic].

MLA

I. Corcoran, Engraver of Gems [Graphic]. I. Corcoran, 0AD. https://collections.library.yale.edu/catalog/33220708.

APA, 6th edition

I. Corcoran, engraver of gems [graphic]. (0 C.E.). [Advertisements, Trade cards (advertising), Ephemera, Engravings England 1791]. I. Corcoran. https://collections.library.yale.edu/catalog/33220708.