APA (7th ed.) Zitazioa
World Health Organization. (2014). Progress on sanitation and drinking-water: 2014 update. World Health Organization.
Chicago Style (17th ed.) Zitazioa
World Health Organization. Progress on Sanitation and Drinking-water: 2014 Update. Geneva, Switzerland: World Health Organization, 2014.
MLA (9th ed.) Zitazioa
World Health Organization. Progress on Sanitation and Drinking-water: 2014 Update. World Health Organization, 2014.
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