Dyfyniad APA

Thornton, J. B. (2004). Enviornmental law (2nd ed.). Sweet and Maxwell.

Dyfyniad Arddull Chicago

Thornton, Justine Beckwith. Enviornmental Law. 2nd ed. London: Sweet and Maxwell, 2004.

Dyfyniad MLA

Thornton, Justine Beckwith. Enviornmental Law. 2nd ed. Sweet and Maxwell, 2004.

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