Kolstad, C. D. (2007). Environmental Economics (2 ed.). Oxford University Press.
Dyfyniad Arddull ChicagoKolstad, Charles D. Environmental Economics. 2 ed. NewDelhi: Oxford University Press, 2007.
Dyfyniad MLAKolstad, Charles D. Environmental Economics. 2 ed. Oxford University Press, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.