[Portrait of a man] [art original].
MLA
Harding, G. P. (George Perfect), 1780-1853, artist. [Portrait of a man] [art original].. [not after 1810]. https://collections.library.yale.edu/catalog/16822559.
APA, 6th edition
Harding, G. P. (George Perfect), 1780-1853, artist. ([not after 1810])[[Portrait of a man] [art original].]. https://collections.library.yale.edu/catalog/16822559.