World Health Organization. (2001). How to develop and implement a national drug policy (2nd ed.). World Health Organization.
芝加哥风格引文World Health Organization. How to Develop and Implement a National Drug Policy. 2nd ed. Geneva: World Health Organization, 2001.
MLA引文World Health Organization. How to Develop and Implement a National Drug Policy. 2nd ed. World Health Organization, 2001.
警告：这些引文格式不一定是100％准确.