Cite

[Chair with cushioned seat] [art original].

MLA

Harding, G. P. (George Perfect), 1780-1853, artist. [Chair with cushioned seat] [art original].. [not after 1810]. https://collections.library.yale.edu/catalog/16822555.

APA, 6th edition

Harding, G. P. (George Perfect), 1780-1853, artist. ([not after 1810])[[Chair with cushioned seat] [art original].]. https://collections.library.yale.edu/catalog/16822555.