Cita APA (7a ed.)

Penrose, R. (1994). Shadows of the mind: A search for the missing science of consciousness. Oxford University Press.

Cita Chicago Style (17a ed.)

Penrose, Roger. Shadows of the Mind: A Search for the Missing Science of Consciousness. Oxford: Oxford University Press, 1994.

Cita MLA (9a ed.)

Penrose, Roger. Shadows of the Mind: A Search for the Missing Science of Consciousness. Oxford University Press, 1994.