MLA

Watson, James, 1740-1790, printmaker. The Right Honorable Sir John Cust, Bart. Speaker of the House of Commons and one of His Majesty's most honorable privy council / [graphic]. [1 January 1769]. https://collections.library.yale.edu/catalog/10980801.

APA, 6th edition

Watson, James, 1740-1790, printmaker. ([1 January 1769])[The Right Honorable Sir John Cust, Bart. Speaker of the House of Commons and one of His Majesty's most honorable privy council / [graphic]]. https://collections.library.yale.edu/catalog/10980801.