[Portrait of Charles James Fox] [art original]
MLA
Beauclerk, Diana, Lady, 1734-1808, artist. [Portrait of Charles James Fox] [art original]. [ca. 1785]. https://collections.library.yale.edu/catalog/11138714.
APA, 6th edition
Beauclerk, Diana, Lady, 1734-1808, artist. ([ca. 1785])[[Portrait of Charles James Fox] [art original]]. https://collections.library.yale.edu/catalog/11138714.