World Health Organization & World Health Organization. (1985). Guidelines for drinking-water quality (2nd ed.). World Health Organization.
Citação do estilo Chicago (17ª ed.)World Health Organization e World Health Organization. Guidelines for Drinking-water Quality. 2nd ed. Geneva: World Health Organization, 1985.
Citação MLA (8ª ed.)World Health Organization e World Health Organization. Guidelines for Drinking-water Quality. 2nd ed. World Health Organization, 1985.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.