Dyfyniad APA
ebrary, Inc, Helm, D., & Hepburn, C. (2009). The economics and politics of climate change. Oxford University Press.
Dyfyniad Arddull Chicago
ebrary, Inc, Dieter Helm, and Cameron Hepburn. The Economics and Politics of Climate Change. Oxford ; New York: Oxford University Press, 2009.
Dyfyniad MLA
ebrary, Inc, et al. The Economics and Politics of Climate Change. Oxford University Press, 2009.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.