Dyfyniad APA

(2007). IPCC fourth assessment report: Climate change 2007. Intergovernmental Panel on Climate Change.

Dyfyniad Arddull Chicago

IPCC Fourth Assessment Report: Climate Change 2007. Geneva 2, Switzerland: Intergovernmental Panel on Climate Change, 2007.

Dyfyniad MLA

IPCC Fourth Assessment Report: Climate Change 2007. Intergovernmental Panel on Climate Change, 2007.

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