MLA

The Padlock to Be or Not to Be a Queen Is the Question. [Graphic]. Published April the 3rd, 1786 by S.W. Fores at his Caracature Warehouse, No. 3 Piccadilly, 0AD. https://collections.library.yale.edu/catalog/10728099.

APA, 6th edition

The padlock to be or not to be a queen is the question. [graphic]. (0 C.E.). [Caricatures and cartoons, Satires (Visual works) England 1786, Etchings England London 1786]. Published April the 3rd, 1786 by S.W. Fores at his Caracature Warehouse, No. 3 Piccadilly. https://collections.library.yale.edu/catalog/10728099.