APA (7th ed.) Citation

Friedman. (2007). The world is flat: A brief history of the twenty-first century. Picador.

Chicago Style (17th ed.) Citation

Friedman. The World Is Flat: A Brief History of the Twenty-first Century. New York: Picador, 2007.

MLA (8th ed.) Citation

Friedman. The World Is Flat: A Brief History of the Twenty-first Century. Picador, 2007.