APA aipamena

World Health Organization. (2011). The fourth ten years of the World Health Organization 1978-1987. World Health Organization.

Chicago Style aipamena

World Health Organization. The Fourth Ten Years of the World Health Organization 1978-1987. Geneva: World Health Organization, 2011.

MLA aipamena

World Health Organization. The Fourth Ten Years of the World Health Organization 1978-1987. World Health Organization, 2011.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.