World Health Organization. (2012). Persisting pain in children: Important information for policy makers. World Health Organization.
Chicago-referens (17:e uppl.)World Health Organization. Persisting Pain in Children: Important Information for Policy Makers. Geneva, Switzerland: World Health Organization, 2012.
MLA-referens (8:e uppl.)World Health Organization. Persisting Pain in Children: Important Information for Policy Makers. World Health Organization, 2012.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.