World Health Organization. (2011). The fourth ten years of the World Health Organization 1978-1987. World Health Organization.
Chicago-Zitierstil (17. Ausg.)World Health Organization. The Fourth Ten Years of the World Health Organization 1978-1987. Geneva: World Health Organization, 2011.
MLA-Zitierstil (8. Ausg.)World Health Organization. The Fourth Ten Years of the World Health Organization 1978-1987. World Health Organization, 2011.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.