Dyfyniad APA

Tietenberg, T. (1992). Environmental and natural resource economics (3rd ed.). HarperCollins Publishers.

Dyfyniad Arddull Chicago

Tietenberg, Thomas. Environmental and Natural Resource Economics. 3rd ed. New York, NY: HarperCollins Publishers, 1992.

Dyfyniad MLA

Tietenberg, Thomas. Environmental and Natural Resource Economics. 3rd ed. HarperCollins Publishers, 1992.

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