Dyfyniad APA

Goodstein, E. S. (1999). Economics and the environment (2nd ed.). Prentice-Hall of India.

Dyfyniad Arddull Chicago

Goodstein, Eban S. Economics and the Environment. 2nd ed. New Jersey: Prentice-Hall of India, 1999.

Dyfyniad MLA

Goodstein, Eban S. Economics and the Environment. 2nd ed. Prentice-Hall of India, 1999.

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