Cite

[Mary, Duchess of Buckingham] [art original].

MLA

[Mary, Duchess of Buckingham] [Art Original]. 0AD. https://collections.library.yale.edu/catalog/16193440.

APA, 6th edition

[Mary, Duchess of Buckingham] [art original]. (0 C.E.). [Portrait drawings, Ink drawings British 19th century]. https://collections.library.yale.edu/catalog/16193440.