MLA

Gillray, James, 1756-1815, printmaker. Le débarquement du Chevalier John Bull et de sa famille á Boulogne sur Mer The landing of Sir John Bull & his family at Boulogne sur Mer. [graphic] =. [31 May 1792]. https://collections.library.yale.edu/catalog/11859392.

APA, 6th edition

Gillray, James, 1756-1815, printmaker. ([31 May 1792])[Le débarquement du Chevalier John Bull et de sa famille á Boulogne sur Mer The landing of Sir John Bull & his family at Boulogne sur Mer. [graphic] =]. https://collections.library.yale.edu/catalog/11859392.