MLA

A Whet on the Road, or, English and French Postillions [Graphic]. Printed for & sold by Carrington Bowles, No. 69 St. Paul's Church Yard, London, 0AD. https://collections.library.yale.edu/catalog/16192356.

APA, 6th edition

A whet on the road, or, English and French postillions [graphic]. (0 C.E.). [Caricatures and cartoons, Satires (Visual works) England 1792, Mezzotints England London 1792]. Printed for & sold by Carrington Bowles, No. 69 St. Paul's Church Yard, London. https://collections.library.yale.edu/catalog/16192356.