MLA

Harding, G. P. (George Perfect), 1780-1853, artist. Abraham Cowley from the original by Lely in the collection at Strawberry Hill / [art original]. [between 1807 and 1812?]. https://collections.library.yale.edu/catalog/33234083.

APA, 6th edition

Harding, G. P. (George Perfect), 1780-1853, artist. ([between 1807 and 1812?])[Abraham Cowley from the original by Lely in the collection at Strawberry Hill / [art original]]. https://collections.library.yale.edu/catalog/33234083.