Παραπομπή APA
Friedman, T. L. (2006). The world is flat: The globalized world in the twenty-first century (Updated and expanded.). London: Penguin.
Παραπομπή Chicago StyleFriedman, Thomas L. The World Is Flat: The Globalized World in the Twenty-first Century. Updated and expanded. London: Penguin, 2006.
Παραπομπή MLAFriedman, Thomas L. The World Is Flat: The Globalized World in the Twenty-first Century. Updated and expanded. London: Penguin, 2006.
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