Cite

[Metallic tractors] [art original].

MLA

Gillray, James, 1756-1815, artist. [Metallic tractors] [art original].. [ca. 1801]. https://collections.library.yale.edu/catalog/17339809.

APA, 6th edition

Gillray, James, 1756-1815, artist. ([ca. 1801])[[Metallic tractors] [art original].]. https://collections.library.yale.edu/catalog/17339809.