APA (7th ed.) Citation

Friedman, T. L. (2007). The world is flat: A brief history of the twenty-first century (first edition (2005).). Picador.

Chicago Style (17th ed.) Citation

Friedman, Thomas L. The World Is Flat: A Brief History of the Twenty-first Century. first edition (2005). New York: Picador, 2007.

MLA (8th ed.) Citation

Friedman, Thomas L. The World Is Flat: A Brief History of the Twenty-first Century. first edition (2005). Picador, 2007.