MLA

Somnambula! [Graphic]. Lewis & Johnson, 96, Cheapside, 0AD. https://collections.library.yale.edu/catalog/10971877.

APA, 6th edition

Somnambula! [graphic]. (0 C.E.). [Satires (Visual works) England 1848, Lithographs England London 1848]. Lewis & Johnson, 96, Cheapside. https://collections.library.yale.edu/catalog/10971877.