MLA

Smith, Benjamin, -1833, printmaker. His most gracious Majesty King George the Third engraved from the original picture in the collection of His Majesty / [graphic]. [2 March 1812]. https://collections.library.yale.edu/catalog/33191938.

APA, 6th edition

Smith, Benjamin, -1833, printmaker. ([2 March 1812])[His most gracious Majesty King George the Third engraved from the original picture in the collection of His Majesty / [graphic]]. https://collections.library.yale.edu/catalog/33191938.