APA aipamena

(2007). Principles of town water supply and sanitation. Washington DC: The World Bank.

Chicago Style aipamena

Principles of Town Water Supply and Sanitation. Washington DC: The World Bank, 2007.

MLA aipamena

Principles of Town Water Supply and Sanitation. Washington DC: The World Bank, 2007.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.