MLA

Royal Love Letters [Graphic]. Published by M.C. Springsguth, 0AD. https://collections.library.yale.edu/catalog/33114426.

APA, 6th edition

Royal love letters [graphic]. (0 C.E.). [Poetry, Caricatures and cartoons, Poems, Satires (Visual works) England 1809, Etchings England London 1809, Watermarks (Paper)]. Published by M.C. Springsguth. https://collections.library.yale.edu/catalog/33114426.