Cite

[Full-length portrait of King George the Third] [graphic].

MLA

[Full-Length Portrait of King George the Third] [Graphic]. publisher not identified, 0AD. https://collections.library.yale.edu/catalog/10955255.

APA, 6th edition

[Full-length portrait of King George the Third] [graphic]. (0 C.E.). [Portrait prints, Engravings England London 1820]. publisher not identified. https://collections.library.yale.edu/catalog/10955255.