Gaya APA

Friedman, T, L. (2006). The World Is Flat : A Brief History Of The Twenty-First Century . United States of As: Farrar, Straus and Giroux.

Gaya MLA

Friedman, Thomas, L.. "The World Is Flat : A Brief History Of The Twenty-First Century". United States of As: Farrar, Straus and Giroux, 2006. Text.