MLA

O Dear! What Can the Matter Be! [Graphic]. Published 12th May 1794 by Laurie & Whittle, 53 Fleet Street, London, 0AD. https://collections.library.yale.edu/catalog/10728469.

APA, 6th edition

O dear! What can the matter be! [graphic]. (0 C.E.). [Genre prints, Ballads England 1794, Songs England 1794, Mezzotints England London 1794]. Published 12th May 1794 by Laurie & Whittle, 53 Fleet Street, London. https://collections.library.yale.edu/catalog/10728469.