APA (7th ed.) Citation

Penrose, R., & Gardner, M. (1989). The emperor's new mind: Concerning computers, minds and the laws of physics. Vintage.

Chicago Style (17th ed.) Citation

Penrose, Roger, and Martin Gardner. The Emperor's New Mind: Concerning Computers, Minds and the Laws of Physics. London: Vintage, 1989.

MLA (8th ed.) Citation

Penrose, Roger, and Martin Gardner. The Emperor's New Mind: Concerning Computers, Minds and the Laws of Physics. Vintage, 1989.