APA استشهاد

Kolstad, C. D. (2011). Intermediate environmental economics (2nd ed.). Oxford University Press.

استشهاد بنمط شيكاغو

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

MLA استشهاد

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