MLA

Watson, James, 1740-1790, printmaker. Maria Countess of Waldegrave, and her daughter Lady Elizabeth Laura [graphic]. [between 1766 and 1779]. https://collections.library.yale.edu/catalog/16193429.

APA, 6th edition

Watson, James, 1740-1790, printmaker. ([between 1766 and 1779])[Maria Countess of Waldegrave, and her daughter Lady Elizabeth Laura [graphic]]. https://collections.library.yale.edu/catalog/16193429.