MLA

A Margate Packet the Effects of a Squall, or a Sudden Shift of Ballast / [Graphic]. Published by G. Humphrey, 27 St. James's Str., London, 0AD. https://collections.library.yale.edu/catalog/33111836.

APA, 6th edition

A Margate packet the effects of a squall, or a sudden shift of ballast / [graphic]. (0 C.E.). [Caricatures and cartoons, caricatures, Aquatints, Hand colored prints, Caricatures, Satires (Visual works) England 1821, Aquatints England London 1821, Watermarks (Paper) J Whatman]. Published by G. Humphrey, 27 St. James's Str., London. https://collections.library.yale.edu/catalog/33111836.