World Health Organization. (2011). Atlas of headache disorders and resources in the world 2011. World Health Organization.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWorld Health Organization. Atlas of Headache Disorders and Resources in the World 2011. Geneva, Switzerland: World Health Organization, 2011.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWorld Health Organization. Atlas of Headache Disorders and Resources in the World 2011. World Health Organization, 2011.
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