Cite

John 2d Earl of Powlett [art original].

MLA

John 2d Earl of Powlett [Art Original]. 0AD. https://collections.library.yale.edu/catalog/16193664.

APA, 6th edition

John 2d Earl of Powlett [art original]. (0 C.E.). [Portraits, Portrait drawings, Watercolors British 19th century]. https://collections.library.yale.edu/catalog/16193664.