Friedman, T. L. (2007). The world is flat: A brief history of the twenty-first century (first edition (2005).). Picador.
Lua i Stíl Chicago (17ú heag.)Friedman, Thomas L. The World Is Flat: A Brief History of the Twenty-first Century. first edition (2005). New York: Picador, 2007.
Lua MLA (8ú heag.)Friedman, Thomas L. The World Is Flat: A Brief History of the Twenty-first Century. first edition (2005). Picador, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.