Dyfyniad APA

Goodstein, E. S. (2011). Economics and the environment (6th ed.). John Wiley.

Dyfyniad Arddull Chicago

Goodstein, Eban S. Economics and the Environment. 6th ed. New Jersey: John Wiley, 2011.

Dyfyniad MLA

Goodstein, Eban S. Economics and the Environment. 6th ed. John Wiley, 2011.

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