APA aipamena

World Health Organization. (2012). World health statistics 2012. World Health Organization.

Chicago Style aipamena

World Health Organization. World Health Statistics 2012. Geneva, Switzerland: World Health Organization, 2012.

MLA aipamena

World Health Organization. World Health Statistics 2012. World Health Organization, 2012.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.