MLA

The Right Hon. George Macartney Earl of Macartney, K.B [Graphic]. Published Jan. 14, 1817 by T. Cadell & W. Davies, Strand, London, 0AD. https://collections.library.yale.edu/catalog/10985112.

APA, 6th edition

The Right Hon. George Macartney Earl of Macartney, K.B [graphic]. (0 C.E.). [Portraits, Portrait prints, Stipple engravings England London 1817]. Published Jan. 14, 1817 by T. Cadell & W. Davies, Strand, London. https://collections.library.yale.edu/catalog/10985112.