Friedman, T. L. (2007). The world is flat: A brief history of the twenty-first century (first edition (2005).). Picador.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFriedman, Thomas L. The World Is Flat: A Brief History of the Twenty-first Century. first edition (2005). New York: Picador, 2007.
एमएलए (8वां संस्करण) प्रशस्ति पत्रFriedman, Thomas L. The World Is Flat: A Brief History of the Twenty-first Century. first edition (2005). Picador, 2007.
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