Cite

[A Wedgwood basalt miniature plaque depicting Sir Robert Walpole] [art original].

MLA

Maratti, Carlo, 1625-1713, artist. [A Wedgwood basalt miniature plaque depicting Sir Robert Walpole] [art original].. [18th century?]. https://collections.library.yale.edu/catalog/15815180.

APA, 6th edition

Maratti, Carlo, 1625-1713, artist. ([18th century?])[[A Wedgwood basalt miniature plaque depicting Sir Robert Walpole] [art original].]. https://collections.library.yale.edu/catalog/15815180.