Cita APA (7th ed.)

Helm, D., & Hepburn, C. (2011). The economics and politics of climate change. Oxford University Press.

Cita Chicago (17th ed.)

Helm, Dieter, i Cameron Hepburn. The Economics and Politics of Climate Change. Oxford ; New York: Oxford University Press, 2011.

Cita MLA (8th ed.)

Helm, Dieter, i Cameron Hepburn. The Economics and Politics of Climate Change. Oxford University Press, 2011.