MLA

An Emblem of America [Graphic]. Published 4th Septr. 1798, by John Fairburn, 146 Minories, London, 0AD. https://collections.library.yale.edu/catalog/10977950.

APA, 6th edition

An emblem of America [graphic]. (0 C.E.). [Pictorial works, Satires (Visual works) England 1798, Portraits, Mezzotints England London 1798]. Published 4th Septr. 1798, by John Fairburn, 146 Minories, London. https://collections.library.yale.edu/catalog/10977950.