Cite

[Man on horseback] [graphic].

MLA

Gillray, James, 1756-1815, printmaker. [Man on horseback] [graphic].. [1809?]. https://collections.library.yale.edu/catalog/10964524.

APA, 6th edition

Gillray, James, 1756-1815, printmaker. ([1809?])[[Man on horseback] [graphic].]. https://collections.library.yale.edu/catalog/10964524.