APA (7th ed.) Citation

Friedman, T. L. (2006). The world is flat: The globalized world in the twenty - first century. Penguin Books.

Chicago Style (17th ed.) Citation

Friedman, Thomas L. The World Is Flat: The Globalized World in the Twenty - First Century. London: Penguin Books, 2006.

MLA (9th ed.) Citation

Friedman, Thomas L. The World Is Flat: The Globalized World in the Twenty - First Century. Penguin Books, 2006.