Cita APA

Friedman, T. L. (2007). The world is flat: A brief history of the Twenty-first Century (1a. ed.). Picador.

Citación estilo Chicago

Friedman, Thomas L. The World Is Flat: A Brief History of the Twenty-first Century. 1a. ed. Nueva York: Picador, 2007.

Cita MLA

Friedman, Thomas L. The World Is Flat: A Brief History of the Twenty-first Century. 1a. ed. Picador, 2007.