MLA

Harding, G. P. (George Perfect), 1780-1853, artist. Cha. Churchill, Esq. L. Genl. of his Mas. Forces, Captain and Governor of the town of Plymouth ... [art original]. [approximately 1805]. https://collections.library.yale.edu/catalog/16704410.

APA, 6th edition

Harding, G. P. (George Perfect), 1780-1853, artist. ([approximately 1805])[Cha. Churchill, Esq. L. Genl. of his Mas. Forces, Captain and Governor of the town of Plymouth ... [art original]]. https://collections.library.yale.edu/catalog/16704410.