APA (7th ed.) Citation

Friedman, T. L. (2007). The world is flat : a brief history of the twenty-first century / Thomas L. Friedman: A brief history of the twenty-first century (1st Picador ed., Further updated and expanded, [Pbk. ed.].). Picador/Farrar, Straus and Giroux.

Chicago Style (17th ed.) Citation

Friedman, Thomas L. The World Is Flat : A Brief History of the Twenty-first Century / Thomas L. Friedman: A Brief History of the Twenty-first Century. 1st Picador ed., Further updated and expanded, [Pbk. ed.]. New York: Picador/Farrar, Straus and Giroux, 2007.

MLA (9th ed.) Citation

Friedman, Thomas L. The World Is Flat : A Brief History of the Twenty-first Century / Thomas L. Friedman: A Brief History of the Twenty-first Century. 1st Picador ed., Further updated and expanded, [Pbk. ed.]. Picador/Farrar, Straus and Giroux, 2007.

Warning: These citations may not always be 100% accurate.