MLA

The Unlucky Discovery [Graphic]. Printed for Carington Bowles, Map & Printseller, No. 69 in St. Paul's Church Yard, London, 0AD. https://collections.library.yale.edu/catalog/10715678.

APA, 6th edition

The unlucky discovery [graphic]. (0 C.E.). [Satires (Visual works) England 1771, Mezzotints England London 1771]. Printed for Carington Bowles, Map & Printseller, No. 69 in St. Paul's Church Yard, London. https://collections.library.yale.edu/catalog/10715678.