World Health Organization. (2012). Persisting pain in children: Important information for pharmacists. World Health Organization.
芝加哥风格引文World Health Organization. Persisting Pain in Children: Important Information for Pharmacists. Geneva, Switzerland: World Health Organization, 2012.
MLA引文World Health Organization. Persisting Pain in Children: Important Information for Pharmacists. World Health Organization, 2012.
警告：这些引文格式不一定是100％准确.