Dyfyniad APA

Kolstad, C. D. (2000). Environmental economics. Oxford University Press.

Dyfyniad Arddull Chicago

Kolstad, Charles D. Environmental Economics. New York: Oxford University Press, 2000.

Dyfyniad MLA

Kolstad, Charles D. Environmental Economics. Oxford University Press, 2000.

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