MLA

Harding, G. P. (George Perfect), 1780-1853, artist. Thomas Kirgate many years printer to Horace Walpole Earl of Orford at Strawberry Hill, died June 11, 1810 aged 76. [art original]. [between 1807 and 1812?]. https://collections.library.yale.edu/catalog/15960352.

APA, 6th edition

Harding, G. P. (George Perfect), 1780-1853, artist. ([between 1807 and 1812?])[Thomas Kirgate many years printer to Horace Walpole Earl of Orford at Strawberry Hill, died June 11, 1810 aged 76. [art original]]. https://collections.library.yale.edu/catalog/15960352.