Dyfyniad APA

Helm, D. Energy, the state, and the market. Oxford University Press.

Dyfyniad Arddull Chicago

Helm, Dieter. Energy, the State, and the Market. Oxford University Press.

Dyfyniad MLA

Helm, Dieter. Energy, the State, and the Market. Oxford University Press.

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