Cite

[Portrait of Sir Robert Walpole and Catherine Shorter] [art original].

MLA

Eccardt, John Giles, -1779, artist. [Portrait of Sir Robert Walpole and Catherine Shorter] [art original].. [ca. 1754]. https://collections.library.yale.edu/catalog/16721012.

APA, 6th edition

Eccardt, John Giles, -1779, artist. ([ca. 1754])[[Portrait of Sir Robert Walpole and Catherine Shorter] [art original].]. https://collections.library.yale.edu/catalog/16721012.