World Health Organization World Plumbing Council. (2006). Health aspects of plumbing. World health Organization.
Chicago-Zitierstil (17. Ausg.)World Health Organization World Plumbing Council. Health Aspects of Plumbing. Geneva: World health Organization, 2006.
MLA-Zitierstil (8. Ausg.)World Health Organization World Plumbing Council. Health Aspects of Plumbing. World health Organization, 2006.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.