The world is flat : a brief history of the twenty-first century

MLA

Friedman, Thomas L. The World Is Flat : a Brief History of the Twenty-first Century. updated and expanded New York (N.Y.): Penguin books, 2006.

APA

Friedman, T. L. (2006). The world is flat : a brief history of the twenty-first century. updated and expanded New York (N.Y.): Penguin books.

Chicago

Friedman, Thomas L. The World Is Flat: A Brief History of the Twenty-First Century. updated and expanded New York (N.Y.): Penguin books, 2006.