Citazione Stile APA (7a Edizione)

Friedman, T. L. (2006). The world is flat: A brief history of the twenty-first century (Updated and expanded.). Farrar, Strauss and Giroux.

Citazione stile Chigago Style (17a edizione)

Friedman, Thomas L. The World Is Flat: A Brief History of the Twenty-first Century. Updated and expanded. New York: Farrar, Strauss and Giroux, 2006.

Citatione MLA (9a ed.)

Friedman, Thomas L. The World Is Flat: A Brief History of the Twenty-first Century. Updated and expanded. Farrar, Strauss and Giroux, 2006.