Dyfyniad APA

Hackett, S. C. (2001). Environmental and natural resources economics: Theory, policy, and the sustainable society (2nd ed.). M.E. Sharpe.

Dyfyniad Arddull Chicago

Hackett, Steven C. Environmental and Natural Resources Economics: Theory, Policy, and the Sustainable Society. 2nd ed. Armonk, N.Y.: M.E. Sharpe, 2001.

Dyfyniad MLA

Hackett, Steven C. Environmental and Natural Resources Economics: Theory, Policy, and the Sustainable Society. 2nd ed. M.E. Sharpe, 2001.

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