MLA

The Radical Ladder [Graphic]. Published by G. Humphrey, 27 St. James's St., 0AD. https://collections.library.yale.edu/catalog/33245903.

APA, 6th edition

The radical ladder [graphic]. (0 C.E.). [Caricatures and cartoons, Satires (Visual works) England 1821, Etchings England London 1821, Annotations (Provenance) 19th century]. Published by G. Humphrey, 27 St. James's St. https://collections.library.yale.edu/catalog/33245903.