World Health Organization. (2001). Sexually transmitted infections: Briefing kit for teachers. World Health Organization.
芝加哥风格引文World Health Organization. Sexually Transmitted Infections: Briefing Kit for Teachers. Manila, Philippines: World Health Organization, 2001.
MLA引文World Health Organization. Sexually Transmitted Infections: Briefing Kit for Teachers. World Health Organization, 2001.
警告：这些引文格式不一定是100％准确.