Cita APA (7a ed.)

Friedman, T. L. (2007). The world is flat: A brief history of the twenty-first century (Further updated and expanded.). Picador/Farrar, Straus and Giroux.

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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