APA-Zitierstil (7. Ausg.)

World Health Organization. (1994). Operation and Maintenance of Urban Water Supply and Sanitation Systems: A guide for managers. World Health Organization.

Chicago-Zitierstil (17. Ausg.)

World Health Organization. Operation and Maintenance of Urban Water Supply and Sanitation Systems: A Guide for Managers. Switzerland: World Health Organization, 1994.

MLA-Zitierstil (9. Ausg.)

World Health Organization. Operation and Maintenance of Urban Water Supply and Sanitation Systems: A Guide for Managers. World Health Organization, 1994.

Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.