MLA

Rowlandson, Thomas, 1756-1827, printmaker. The progress of the Emperor Napoleon [graphic].. [not before 19 November 1808]. https://collections.library.yale.edu/catalog/16192467.

APA, 6th edition

Rowlandson, Thomas, 1756-1827, printmaker. ([not before 19 November 1808])[The progress of the Emperor Napoleon [graphic].]. https://collections.library.yale.edu/catalog/16192467.