Dyfyniad APA

Van der Ploeg, R., & Withagen, C. (2010). Is there really a green paradox? University of Oxford.

Dyfyniad Arddull Chicago

Van der Ploeg, R., and C. Withagen. Is There Really a Green Paradox? University of Oxford, 2010.

Dyfyniad MLA

Van der Ploeg, R., and C. Withagen. Is There Really a Green Paradox? University of Oxford, 2010.

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