Cite

Henrietta Hobart, Countess of Suffolk [art original].

MLA

Harding, G. P. (George Perfect), 1780-1853, artist. Henrietta Hobart, Countess of Suffolk [art original].. [not after 1810]. https://collections.library.yale.edu/catalog/16822551.

APA, 6th edition

Harding, G. P. (George Perfect), 1780-1853, artist. ([not after 1810])[Henrietta Hobart, Countess of Suffolk [art original].]. https://collections.library.yale.edu/catalog/16822551.