MLA

De Wilde, Samuel, 1751-1832, printmaker. The Right Honourable Georgiana Lady Viscountess Spencer and her daughter the Hon. Miss Georgiana Spencer [graphic]. [1771]. https://collections.library.yale.edu/catalog/16194804.

APA, 6th edition

De Wilde, Samuel, 1751-1832, printmaker. ([1771])[The Right Honourable Georgiana Lady Viscountess Spencer and her daughter the Hon. Miss Georgiana Spencer [graphic]]. https://collections.library.yale.edu/catalog/16194804.