Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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