Dyfyniad APA

Greenspan, A. (2007). The age of turbulence: Adventures in a new world. Penguin Press.

Dyfyniad Arddull Chicago

Greenspan, Alan. The Age of Turbulence: Adventures in a New World. New York: Penguin Press, 2007.

Dyfyniad MLA

Greenspan, Alan. The Age of Turbulence: Adventures in a New World. Penguin Press, 2007.

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