World Health Organization. (2012). Persisting pain in children: Important information for pharmacists. World Health Organization.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWorld Health Organization. Persisting Pain in Children: Important Information for Pharmacists. Geneva, Switzerland: World Health Organization, 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWorld Health Organization. Persisting Pain in Children: Important Information for Pharmacists. World Health Organization, 2012.
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