MLA

A Great Archetect Modelling, or, Sr W- in His Study [Graphic]. Published Jany. 13, 1791, by S.W. Fores, 0AD. https://collections.library.yale.edu/catalog/10732523.

APA, 6th edition

A great archetect modelling, or, Sr W- in his study [graphic]. (0 C.E.). [Caricatures and cartoons, Satires (Visual works) England 1791, Etchings England London 1791]. Published Jany. 13, 1791, by S.W. Fores. https://collections.library.yale.edu/catalog/10732523.