World Health Organization. (2001). Sexually transmitted infections: Briefing kit for teachers. World Health Organization.
Chicago-referens (17:e uppl.)World Health Organization. Sexually Transmitted Infections: Briefing Kit for Teachers. Manila, Philippines: World Health Organization, 2001.
MLA-referens (8:e uppl.)World Health Organization. Sexually Transmitted Infections: Briefing Kit for Teachers. World Health Organization, 2001.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.