APA (7th ed.) Citation
Friedman, T. L. (2006). The world is flat: The globalized world in the twenty-fist century. Penguin Books.
Chicago Style (17th ed.) Citation
Friedman, Thomas L. The World Is Flat: The Globalized World in the Twenty-fist Century. 2006: Penguin Books, 2006.
MLA (9th ed.) Citation
Friedman, Thomas L. The World Is Flat: The Globalized World in the Twenty-fist Century. Penguin Books, 2006.
Warning: These citations may not always be 100% accurate.