World Health Organization & World Health Organization. (1998). Regulatory Situation of Herbal Medicines. World Health organization.
芝加哥风格引文World Health Organization 与 World Health Organization. Regulatory Situation of Herbal Medicines. Geneva: World Health organization, 1998.
MLA引文World Health Organization 与 World Health Organization. Regulatory Situation of Herbal Medicines. World Health organization, 1998.
警告：这些引文格式不一定是100％准确.