Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

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