Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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