1. Alli BO (2008) Fundamental principles of occupational health and safety International Labour Office – Geneva: ILO, 200
2. City of Bulawayo (N.D (a)) Engineering Services, Water Branch Standard operating procedures
3. City of Bulawayo (N.D (b)) Safety, Health and Environmental (SHE) Policy
4. City of Harare (N.D) Safety, Health and Environmental (SHE) Policy
5. City of Bulawayo (1966) Public Health By-Laws