World Health Organization. (2012). Persisting pain in children: Important information for physicians and nurses. World Health Organization.
Цитирование в стиле Чикаго (17-е изд.)World Health Organization. Persisting Pain in Children: Important Information for Physicians and Nurses. Geneva, Switzerland: World Health Organization, 2012.
Цитирование MLA (8-е изд.)World Health Organization. Persisting Pain in Children: Important Information for Physicians and Nurses. World Health Organization, 2012.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.