APA aipamena

World Health Organization World Plumbing Council. (2006). Health aspects of plumbing. World health Organization.

Chicago Style aipamena

World Health Organization World Plumbing Council. Health Aspects of Plumbing. Geneva: World health Organization, 2006.

MLA aipamena

World Health Organization World Plumbing Council. Health Aspects of Plumbing. World health Organization, 2006.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.