Helm, D., & Hepburn, C. (2011). The economics and politics of climate change. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Helm, Dieter, agus Cameron Hepburn. The Economics and Politics of Climate Change. Oxford ; New York: Oxford University Press, 2011.
Lua MLA (8ú heag.)Helm, Dieter, agus Cameron Hepburn. The Economics and Politics of Climate Change. Oxford University Press, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.