MLA

Nixon, John, -1818, artist. A patent extinguisher, being a safe & easy mode of putting out a candle [art original].. [ca. July 1801]. https://collections.library.yale.edu/catalog/15955100.

APA, 6th edition

Nixon, John, -1818, artist. ([ca. July 1801])[A patent extinguisher, being a safe & easy mode of putting out a candle [art original].]. https://collections.library.yale.edu/catalog/15955100.