MLA

Harding, G. P. (George Perfect), 1780-1853, artist. The right Honourable and most noble Robert Devereux, Earle of Essex and Ewe ... [art original]. [not after 1853]. https://collections.library.yale.edu/catalog/16704430.

APA, 6th edition

Harding, G. P. (George Perfect), 1780-1853, artist. ([not after 1853])[The right Honourable and most noble Robert Devereux, Earle of Essex and Ewe ... [art original]]. https://collections.library.yale.edu/catalog/16704430.