MLA

Bell, E., and artist. The Three Ladies Waldegrave [Art Original]. 0AD. https://collections.library.yale.edu/catalog/17469298.

APA, 6th edition

Bell, E., & artist. (0 C.E.). The three Ladies Waldegrave [art original] [Reproductions, Group portraits, Portrait drawings, Ink drawings, Wash drawings]. https://collections.library.yale.edu/catalog/17469298.