MLA

Gillray, James, 1756-1815, printmaker. Preliminaries of peace!, or, John Bull and his little friends "marching to Paris" [graphic]. [6 October 1801]. https://collections.library.yale.edu/catalog/11858792.

APA, 6th edition

Gillray, James, 1756-1815, printmaker. ([6 October 1801])[Preliminaries of peace!, or, John Bull and his little friends "marching to Paris" [graphic]]. https://collections.library.yale.edu/catalog/11858792.