MLA

A Figure That Appear'd in a Mazarine Gown at the King of Denmarks Masquerade Ball [Graphic]. Oxford Magazine, 0AD. https://collections.library.yale.edu/catalog/10713363.

APA, 6th edition

A figure that appear'd in a Mazarine gown at the King of Denmarks masquerade ball [graphic]. (0 C.E.). [Caricatures and cartoons, Satires (Visual works) England 1768, Periodical illustrations, Etchings England London 1768]. Oxford Magazine. https://collections.library.yale.edu/catalog/10713363.