World Health Organization. (1989). Tropical diseases: Progress in international research, 1987-1988. World Health Organization.
Chicago-Zitierstil (17. Ausg.)World Health Organization. Tropical Diseases: Progress in International Research, 1987-1988. Geneva: World Health Organization, 1989.
MLA-Zitierstil (9. Ausg.)World Health Organization. Tropical Diseases: Progress in International Research, 1987-1988. World Health Organization, 1989.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.