MLA

Gillray, James, 1756-1815, printmaker. Dilettanti-theatricals, or, A peep at the green room vide, Pic-Nic-orgies / [graphic]. [18 February 1803]. https://collections.library.yale.edu/catalog/11861145.

APA, 6th edition

Gillray, James, 1756-1815, printmaker. ([18 February 1803])[Dilettanti-theatricals, or, A peep at the green room vide, Pic-Nic-orgies / [graphic]]. https://collections.library.yale.edu/catalog/11861145.