APA (7th ed.) Citation

FRIEDMAN. (2006). The World is Flat: The globalized world in the Twenty-first Century. New York Penguin Books 2006.

Chicago Style (17th ed.) Citation

FRIEDMAN. The World Is Flat: The Globalized World in the Twenty-first Century. New York: New York Penguin Books 2006, 2006.

MLA (8th ed.) Citation

FRIEDMAN. The World Is Flat: The Globalized World in the Twenty-first Century. New York Penguin Books 2006, 2006.