APA استشهاد

Costanza, R. (2015). Introduction to ecological economics (2nd ed.). CRC Press.

استشهاد بنمط شيكاغو

Costanza, Robert....[et.al]. Introduction to Ecological Economics. 2nd ed. Boca Raton: CRC Press, 2015.

MLA استشهاد

Costanza, Robert....[et.al]. Introduction to Ecological Economics. 2nd ed. CRC Press, 2015.