MLA

Heintz, C. F., and printmaker. Die Entdeckung [Graphic]. publisher not identified, 0AD. https://collections.library.yale.edu/catalog/33117556.

APA, 6th edition

Heintz, C. F., & printmaker. (0 C.E.). Die Entdeckung [graphic] [Satires (Visual works) England 1790, Lithographs Germany 1830]. publisher not identified. https://collections.library.yale.edu/catalog/33117556.