MLA

Sheppard, Robert, active 1730-1740, printmaker. The Most High Puissant and Noble Prince John Churchill, Duke and Earl of Marlborough ... and Knight of the Garter [graphic]. [1732?]. https://collections.library.yale.edu/catalog/10985121.

APA, 6th edition

Sheppard, Robert, active 1730-1740, printmaker. ([1732?])[The Most High Puissant and Noble Prince John Churchill, Duke and Earl of Marlborough ... and Knight of the Garter [graphic]]. https://collections.library.yale.edu/catalog/10985121.