Dyfyniad APA

(1991). Environmental Protection And International Law Editors Winfried Lang .... [et All]. Graham & Trotman.

Dyfyniad Arddull Chicago

Environmental Protection And International Law Editors Winfried Lang .... [et All]. Graham & Trotman, 1991.

Dyfyniad MLA

Environmental Protection And International Law Editors Winfried Lang .... [et All]. Graham & Trotman, 1991.

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