(1991). Environmental Protection And International Law / Ed. Winfried Lang, Hanspeter Neuhold, Karl Zemanek. Graham & Trotman.
Chicago-referens (17:e uppl.)Environmental Protection And International Law / Ed. Winfried Lang, Hanspeter Neuhold, Karl Zemanek. Graham & Trotman, 1991.
MLA-referens (8:e uppl.)Environmental Protection And International Law / Ed. Winfried Lang, Hanspeter Neuhold, Karl Zemanek. Graham & Trotman, 1991.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.