MLA

The Guardian [Graphic]. Published 1830 by Tregear, 123 Cheapside, 0AD. https://collections.library.yale.edu/catalog/15808727.

APA, 6th edition

The guardian [graphic]. (0 C.E.). [Satires (Visual works) England 1830, Etchings England London 1830, Aquatints England London 1830]. Published 1830 by Tregear, 123 Cheapside. https://collections.library.yale.edu/catalog/15808727.