Greenspan, A. (2007). The age of turbulence: Adventures in a new world. Penguin Press.
Cita Chicago (17th ed.)Greenspan, Alan. The Age of Turbulence: Adventures in a New World. New York: Penguin Press, 2007.
Cita MLA (9th ed.)Greenspan, Alan. The Age of Turbulence: Adventures in a New World. Penguin Press, 2007.
Atenció: Aquestes cites poden no estar 100% correctes.