Cita APA (7th ed.)
(2011). Guidelines for drinking-water quality (4th ed.). WHO.
Cita Chicago (17th ed.)
Guidelines for Drinking-water Quality. 4th ed. Geneva: WHO, 2011.
Cita MLA (9th ed.)
Guidelines for Drinking-water Quality. 4th ed. WHO, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.