Dyfyniad APA

Thomas, J. M., & Thomas, J. M. (2007). Environmental economics: Applictions, policy, and theory. Thomson South-Western.

Dyfyniad Arddull Chicago

Thomas, Janet M., and Janet M. Thomas. Environmental Economics: Applictions, Policy, and Theory. Thomson South-Western, 2007.

Dyfyniad MLA

Thomas, Janet M., and Janet M. Thomas. Environmental Economics: Applictions, Policy, and Theory. Thomson South-Western, 2007.

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