Greenspan, A. (2007). Age of turbulence: Adventures in a new world (NA.). Penguin Books.
芝加哥风格引文Greenspan, Alan. Age of Turbulence: Adventures in a New World. NA. New York: Penguin Books, 2007.
MLA引文Greenspan, Alan. Age of Turbulence: Adventures in a New World. NA. Penguin Books, 2007.
警告：这些引文格式不一定是100％准确.