APA (7th ed.) Citation

Friedman, T. L. (2005). The World is flat: A brief history of the globalized world in the twenty-first century. Penguin Books Ltd..

Chicago Style (17th ed.) Citation

Friedman, Thomas L. The World Is Flat: A Brief History of the Globalized World in the Twenty-first Century. England: Penguin Books Ltd., 2005.

MLA (9th ed.) Citation

Friedman, Thomas L. The World Is Flat: A Brief History of the Globalized World in the Twenty-first Century. Penguin Books Ltd., 2005.