MLA

Gillray, James, 1756-1815, printmaker. Scientific researches! New discoveries in pneumaticks!, or, An experimental lecture on the powers of air [graphic]. [23 May 1802]. https://collections.library.yale.edu/catalog/17339249.

APA, 6th edition

Gillray, James, 1756-1815, printmaker. ([23 May 1802])[Scientific researches! New discoveries in pneumaticks!, or, An experimental lecture on the powers of air [graphic]]. https://collections.library.yale.edu/catalog/17339249.