Friedman, T. L. (2006). The world is flat: The globalized world in the twenty-first century (Updated and expanded.). Penguin Books.
Citace podle Chicago (17th ed.)Friedman, Thomas L. The World Is Flat: The Globalized World in the Twenty-first Century. Updated and expanded. London: Penguin Books, 2006.
Citace podle MLA (9th ed.)Friedman, Thomas L. The World Is Flat: The Globalized World in the Twenty-first Century. Updated and expanded. Penguin Books, 2006.
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