Trouwborst, A. (2002). Evolution and status of the precautionary principle on international law. Kluwer Law International.
Dyfyniad Arddull ChicagoTrouwborst, Arie. Evolution and Status of the Precautionary Principle on International Law. The Hague, Netherlands: Kluwer Law International, 2002.
Dyfyniad MLATrouwborst, Arie. Evolution and Status of the Precautionary Principle on International Law. Kluwer Law International, 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.