MLA

Miller, Sanderson, 1716-1780, artist. [Design for a fan-vaulting ceiling ornament] [art original].. [not after 1780]. https://collections.library.yale.edu/catalog/15510996.

APA, 6th edition

Miller, Sanderson, 1716-1780, artist. ([not after 1780])[[Design for a fan-vaulting ceiling ornament] [art original].]. https://collections.library.yale.edu/catalog/15510996.