Cita APA (7a ed.)

Penrose, R., & Gardner, M. (1990). The emperor's new mind: Concerning computers, minds, and the laws of physics. University Press.

Cita Chicago Style (17a ed.)

Penrose, Roger, y Martin Gardner. The Emperor's New Mind: Concerning Computers, Minds, and the Laws of Physics. Oxford [etc.]: University Press, 1990.

Cita MLA (9a ed.)

Penrose, Roger, y Martin Gardner. The Emperor's New Mind: Concerning Computers, Minds, and the Laws of Physics. University Press, 1990.