APA (7th ed.) Citation

Penrose, R. (1991). The emperor's new mind: Concerning computers, minds, and the laws of physics. Penguin Books.

Chicago Style (17th ed.) Citation

Penrose, Roger. The Emperor's New Mind: Concerning Computers, Minds, and the Laws of Physics. New York, N.Y., U.S.A: Penguin Books, 1991.

MLA (9th ed.) Citation

Penrose, Roger. The Emperor's New Mind: Concerning Computers, Minds, and the Laws of Physics. Penguin Books, 1991.