Dyfyniad APA

(1991). Environmental Protection And International Law / Ed. Winfried Lang, Hanspeter Neuhold, Karl Zemanek. Graham & Trotman.

Dyfyniad Arddull Chicago

Environmental Protection And International Law / Ed. Winfried Lang, Hanspeter Neuhold, Karl Zemanek. Graham & Trotman, 1991.

Dyfyniad MLA

Environmental Protection And International Law / Ed. Winfried Lang, Hanspeter Neuhold, Karl Zemanek. Graham & Trotman, 1991.

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