MLA

Bretherton, James, approximately 1730-1806, printmaker. [Portrait of the Duke of Grafton standing in profile to the left, wearing hat and Garter star and holding a walking stick] [graphic]. July 1782.. https://collections.library.yale.edu/catalog/10724625.

APA, 6th edition

Bretherton, James, approximately 1730-1806, printmaker. (July 1782.)[[Portrait of the Duke of Grafton standing in profile to the left, wearing hat and Garter star and holding a walking stick] [graphic]]. https://collections.library.yale.edu/catalog/10724625.