Cita APA

Friedman, T. L. 1. (2007). The world is flat: A brief history of the twenty-first century. New York: Picador.

Citación estilo Chicago

Friedman, Thomas L. 1953-. The World Is Flat: A Brief History of the Twenty-first Century. New York: Picador, 2007.

Cita MLA

Friedman, Thomas L. 1953-. The World Is Flat: A Brief History of the Twenty-first Century. New York: Picador, 2007.