MLA

Rowlandson, Thomas, 1756-1827, printmaker. St. Valentines Day, or, John Bull intercepting a letter to his wife [graphic].. [23 February 1809]. https://collections.library.yale.edu/catalog/11792917.

APA, 6th edition

Rowlandson, Thomas, 1756-1827, printmaker. ([23 February 1809])[St. Valentines Day, or, John Bull intercepting a letter to his wife [graphic].]. https://collections.library.yale.edu/catalog/11792917.