Gaya APA

Greenspan, Alan. (2007). The Age of Turbulence . United States of America: The Penguin Press.

Gaya Chicago

Greenspan, Alan. The Age of Turbulence. United States of America: The Penguin Press, 2007. Text.

Gaya MLA

Greenspan, Alan. The Age of Turbulence. United States of America: The Penguin Press, 2007. Text.

Gaya Turabian

Greenspan, Alan. The Age of Turbulence. United States of America: The Penguin Press, 2007. Print.