Dyfyniad APA

Pearce, D. W., & Warfored, J. J. (1993). World without end: Economics, environment and sustainable development. Oxford.

Dyfyniad Arddull Chicago

Pearce, D. W., and J. J. Warfored. World Without End: Economics, Environment and Sustainable Development. New York: Oxford, 1993.

Dyfyniad MLA

Pearce, D. W., and J. J. Warfored. World Without End: Economics, Environment and Sustainable Development. Oxford, 1993.

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