APA (7th ed.) Citation

Penrose, R. (1989). The emperor's new mind: Concerning computers, minds and the laws of physics. Penguin Group.

Chicago Style (17th ed.) Citation

Penrose, Roger. The Emperor's New Mind: Concerning Computers, Minds and the Laws of Physics. New York: Penguin Group, 1989.

MLA (9th ed.) Citation

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