World Health Organization. (2000). World directory of medical schools (7th-ed.). World Health organization.
芝加哥风格引文World Health Organization. World Directory of Medical Schools. 7th-ed. Geneva: World Health organization, 2000.
MLA引文World Health Organization. World Directory of Medical Schools. 7th-ed. World Health organization, 2000.
警告：这些引文格式不一定是100％准确.