MLA

Woolnoth, Thomas, 1785- printmaker. Her Most Gracious Majesty Caroline, Queen of England [graphic]. [28 June 1820]. https://collections.library.yale.edu/catalog/16817027.

APA, 6th edition

Woolnoth, Thomas, 1785- printmaker. ([28 June 1820])[Her Most Gracious Majesty Caroline, Queen of England [graphic]]. https://collections.library.yale.edu/catalog/16817027.