MLA

Purcell, Richard, approximately 1736-approximately 1765, printmaker. The laughing audience [graphic]. [between 1746 and 1766?]. https://collections.library.yale.edu/catalog/16034767.

APA, 6th edition

Purcell, Richard, approximately 1736-approximately 1765, printmaker. ([between 1746 and 1766?])[The laughing audience [graphic]]. https://collections.library.yale.edu/catalog/16034767.