APA aipamena

World Health Organization. (1999). Reduction of maternal mortality. World health Organization.

Chicago Style aipamena

World Health Organization. Reduction of Maternal Mortality. Geneva: World health Organization, 1999.

MLA aipamena

World Health Organization. Reduction of Maternal Mortality. World health Organization, 1999.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.