Friedman, T. L. (2006). The world is flat: A brief history of the twenty-first century (Updated and expanded.). Farrar, Strauss and Giroux.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFriedman, Thomas L. The World Is Flat: A Brief History of the Twenty-first Century. Updated and expanded. New York: Farrar, Strauss and Giroux, 2006.
एमएलए (9वां संस्करण) प्रशस्ति पत्रFriedman, Thomas L. The World Is Flat: A Brief History of the Twenty-first Century. Updated and expanded. Farrar, Strauss and Giroux, 2006.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.