World Health Organization. (2001). Sexually transmitted infections: Briefing kit for teachers. World Health Organization.
Cita Chicago (17th ed.)World Health Organization. Sexually Transmitted Infections: Briefing Kit for Teachers. Manila, Philippines: World Health Organization, 2001.
Cita MLA (8th ed.)World Health Organization. Sexually Transmitted Infections: Briefing Kit for Teachers. World Health Organization, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.