Friedman, T. L. (2006). The World is flat: The globalized world in the twenty-fist century (updated and expanded.). Penguin Books.
Dyfyniad Arddull ChicagoFriedman, Thomas L. The World Is Flat: The Globalized World in the Twenty-fist Century. updated and expanded. 2006: Penguin Books, 2006.
Dyfyniad MLAFriedman, Thomas L. The World Is Flat: The Globalized World in the Twenty-fist Century. updated and expanded. Penguin Books, 2006.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.