(1991). Environmental Protection And International Law / Ed. Winfried Lang, Hanspeter Neuhold, Karl Zemanek. Graham & Trotman.
Lua i Stíl Chicago (17ú heag.)Environmental Protection And International Law / Ed. Winfried Lang, Hanspeter Neuhold, Karl Zemanek. Graham & Trotman, 1991.
Lua MLA (8ú heag.)Environmental Protection And International Law / Ed. Winfried Lang, Hanspeter Neuhold, Karl Zemanek. Graham & Trotman, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.