Cita APA (7a ed.)

Kurzweil, R. (2000). The Age of spiritual machines: When computers exceed human intelligence. Penguin.

Cita Chicago Style (17a ed.)

Kurzweil, Ray. The Age of Spiritual Machines: When Computers Exceed Human Intelligence. London: Penguin, 2000.

Cita MLA (9a ed.)

Kurzweil, Ray. The Age of Spiritual Machines: When Computers Exceed Human Intelligence. Penguin, 2000.