World Health Organization & World Health Organization. (1985). Guidelines for drinking-water quality (2nd ed.). World Health Organization.
Citazione stile Chigago Style (17a edizione)World Health Organization e World Health Organization. Guidelines for Drinking-water Quality. 2nd ed. Geneva: World Health Organization, 1985.
Citatione MLA (8a ed.)World Health Organization e World Health Organization. Guidelines for Drinking-water Quality. 2nd ed. World Health Organization, 1985.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.