Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (8a ed.)

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