APA aipamena

United Nations Human Settlements Programme. (2003). Water and sanitation in the world's cities: Local action for global goals. Earthscan.

Chicago Style aipamena

United Nations Human Settlements Programme. Water and Sanitation in the World's Cities: Local Action for Global Goals. London: Earthscan, 2003.

MLA aipamena

United Nations Human Settlements Programme. Water and Sanitation in the World's Cities: Local Action for Global Goals. Earthscan, 2003.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.