MLA

Woodward, G. M. (George Moutard), approximately 1760-1809, artist. The elevated ferrule [art original].. [approximately 1790]. https://collections.library.yale.edu/catalog/10731201.

APA, 6th edition

Woodward, G. M. (George Moutard), approximately 1760-1809, artist. ([approximately 1790])[The elevated ferrule [art original].]. https://collections.library.yale.edu/catalog/10731201.