Dyfyniad APA

de Sadeleer, N. (2002). Environmental principles: From political slogans to legal rules. Oxford.

Dyfyniad Arddull Chicago

de Sadeleer, Nicolas. Environmental Principles: From Political Slogans to Legal Rules. New York: Oxford, 2002.

Dyfyniad MLA

de Sadeleer, Nicolas. Environmental Principles: From Political Slogans to Legal Rules. Oxford, 2002.

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