Cite

[Sketch of a portrait of Isaac D'Israeli] [art original].

MLA

Gillray, James, 1756-1815, artist. [Sketch of a portrait of Isaac D'Israeli] [art original].. [approximately 1802]. https://collections.library.yale.edu/catalog/11861466.

APA, 6th edition

Gillray, James, 1756-1815, artist. ([approximately 1802])[[Sketch of a portrait of Isaac D'Israeli] [art original].]. https://collections.library.yale.edu/catalog/11861466.