Cite

[Ossuarium - 3 square, 1 round] [art original].

MLA

Carter, John, 1748-1817, artist. [Ossuarium - 3 square, 1 round] [art original].. [approximately 1790]. https://collections.library.yale.edu/catalog/16732996.

APA, 6th edition

Carter, John, 1748-1817, artist. ([approximately 1790])[[Ossuarium - 3 square, 1 round] [art original].]. https://collections.library.yale.edu/catalog/16732996.