Dyfyniad APA

Kolstad, C. D. (2011). Intermediate Environmental Economics (2nd.). Oxford University Press.

Dyfyniad Arddull Chicago

Kolstad, Charles D. Intermediate Environmental Economics. 2nd. New Delhi: Oxford University Press, 2011.

Dyfyniad MLA

Kolstad, Charles D. Intermediate Environmental Economics. 2nd. Oxford University Press, 2011.

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