MLA

The Incumbent [Graphic]. Pub. Decr. 1, 1790, by W. Holland, No. 50 Oxford St., 0AD. https://collections.library.yale.edu/catalog/10732483.

APA, 6th edition

The incumbent [graphic]. (0 C.E.). [Satires (Visual works) England 1790, Aquatints England London 1790]. Pub. Decr. 1, 1790, by W. Holland, No. 50 Oxford St. https://collections.library.yale.edu/catalog/10732483.