MLA

Harding, G. P. (George Perfect), 1780-1853, artist. [Marble sarcophagus] [art original].. [not after 1824]. https://collections.library.yale.edu/catalog/16193537.

APA, 6th edition

Harding, G. P. (George Perfect), 1780-1853, artist. ([not after 1824])[[Marble sarcophagus] [art original].]. https://collections.library.yale.edu/catalog/16193537.