MLA

Toby [Graphic]. Published March 1, 1821, by G. Smeeton, St. Martin's Church Yard, 0AD. https://collections.library.yale.edu/catalog/15956821.

APA, 6th edition

Toby [graphic]. (0 C.E.). [Portrait prints, Stipple engravings England London 1821, Etchings England London 1821]. Published March 1, 1821, by G. Smeeton, St. Martin's Church Yard. https://collections.library.yale.edu/catalog/15956821.