MLA

Frontispiece to the Middlesex Petition. publisher not identified, 0AD. https://collections.library.yale.edu/catalog/10713413.

APA, 6th edition

Frontispiece to the Middlesex petition. (0 C.E.). [Caricatures and cartoons, Etchings England London 1769, Broadsides]. publisher not identified. https://collections.library.yale.edu/catalog/10713413.