World Health Organization. (2001). Sexually transmitted infections: Briefing kit for teachers. World Health Organization.
Chicago-Zitierstil (17. Ausg.)World Health Organization. Sexually Transmitted Infections: Briefing Kit for Teachers. Manila, Philippines: World Health Organization, 2001.
MLA-Zitierstil (8. Ausg.)World Health Organization. Sexually Transmitted Infections: Briefing Kit for Teachers. World Health Organization, 2001.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.