MLA

Murphy, John, 1753-1798, printmaker. Her Royal Highness Princess of Wales [graphic]. [21 May 1795]. https://collections.library.yale.edu/catalog/16194660.

APA, 6th edition

Murphy, John, 1753-1798, printmaker. ([21 May 1795])[Her Royal Highness Princess of Wales [graphic]]. https://collections.library.yale.edu/catalog/16194660.