Dyfyniad APA

(1981). Environmental policy and the law - Book II.

Dyfyniad Arddull Chicago

Environmental Policy and the Law - Book II. 1981.

Dyfyniad MLA

Environmental Policy and the Law - Book II. 1981.

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