MLA

A Meeting of City Politician's [Graphic]. Published July 30th, 1779, by WRichardson, No. 68 High Holborn, 0AD. https://collections.library.yale.edu/catalog/10723298.

APA, 6th edition

A meeting of city politician's [graphic]. (0 C.E.). [Satires (Visual works) England 1779, Etchings England London 1779]. Published July 30th, 1779, by WRichardson, No. 68 High Holborn. https://collections.library.yale.edu/catalog/10723298.