Cite

Duke of Queensberry at the age of 77 [art original].

MLA

Duke of Queensberry at the Age of 77 [Art Original]. 0AD. https://collections.library.yale.edu/catalog/17480298.

APA, 6th edition

Duke of Queensberry at the age of 77 [art original]. (0 C.E.). [Caricatures and cartoons, Caricatures, Wash drawings, Ink drawings]. https://collections.library.yale.edu/catalog/17480298.