Dyfyniad APA

Friedman, T. L. (2008). Hot, flat and crowded: Why the world needs a green revolution and how can we renew. Penguin Books.

Dyfyniad Arddull Chicago

Friedman, Thomas L. Hot, Flat and Crowded: Why the World Needs a Green Revolution and How Can We Renew. New York: Penguin Books, 2008.

Dyfyniad MLA

Friedman, Thomas L. Hot, Flat and Crowded: Why the World Needs a Green Revolution and How Can We Renew. Penguin Books, 2008.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.