World Health Organization. (2011). Psychological first aid: Guide for field workers. World Health Organization.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWorld Health Organization. Psychological First Aid: Guide for Field Workers. Geneva, Switzerland: World Health Organization, 2011.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWorld Health Organization. Psychological First Aid: Guide for Field Workers. World Health Organization, 2011.
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