Professional. Water (Prevention & Control of Pollution) Act, 1974. Professional Book Publishers.
Chicago-referens (17:e uppl.)Professional. Water (Prevention & Control of Pollution) Act, 1974. Professional Book Publishers.
MLA-referens (9:e uppl.)Professional. Water (Prevention & Control of Pollution) Act, 1974. Professional Book Publishers.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.