Não informado. (1981). Environmental Monitoring and Assessment. Kluwer Academic Publishers.
Chicago-referens (17:e uppl.)Não informado. Environmental Monitoring and Assessment. Dordrecht, Holanda: Kluwer Academic Publishers, 1981.
MLA-referens (8:e uppl.)Não informado. Environmental Monitoring and Assessment. Kluwer Academic Publishers, 1981.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.