Cite

Triangular chair [art original].

MLA

Harding, G. P. (George Perfect), 1780-1853, artist. Triangular chair [art original].. [not after 1810]. https://collections.library.yale.edu/catalog/16822553.

APA, 6th edition

Harding, G. P. (George Perfect), 1780-1853, artist. ([not after 1810])[Triangular chair [art original].]. https://collections.library.yale.edu/catalog/16822553.