APA (7th ed.) Zitazioa
ebrary, Inc. (2004). Guidelines for drinking-water quality (3rd ed.). World Health Organization.
Chicago Style (17th ed.) Zitazioa
ebrary, Inc. Guidelines for Drinking-water Quality. 3rd ed. Geneva: World Health Organization, 2004.
MLA (9th ed.) Zitazioa
ebrary, Inc. Guidelines for Drinking-water Quality. 3rd ed. World Health Organization, 2004.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.