MLA

A Certain Great Personage Learning to Spell [Graphic]. Oxford magazine, 0AD. https://collections.library.yale.edu/catalog/15950077.

APA, 6th edition

A certain great personage learning to spell [graphic]. (0 C.E.). [Caricatures and cartoons, Satires (Visual works) England 1770, Etchings England London 1770, Periodical illustrations]. Oxford magazine. https://collections.library.yale.edu/catalog/15950077.