Dyfyniad APA

Tietenberg, T. H. (2004). Environmental and natural resource economics (6th ed.). Addison Wesley ; Pearson Education.

Dyfyniad Arddull Chicago

Tietenberg, Thomas H. Environmental and Natural Resource Economics. 6th ed. Boston ; India: Addison Wesley ; Pearson Education, 2004.

Dyfyniad MLA

Tietenberg, Thomas H. Environmental and Natural Resource Economics. 6th ed. Addison Wesley ; Pearson Education, 2004.

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