Cite

At the opera [graphic].

MLA

Gillray, James, 1756-1815, printmaker. At the opera [graphic].. [4 October 1791]. https://collections.library.yale.edu/catalog/10732645.

APA, 6th edition

Gillray, James, 1756-1815, printmaker. ([4 October 1791])[At the opera [graphic].]. https://collections.library.yale.edu/catalog/10732645.