World Health Organization Kobe Center. (1999). Ageing and health: A global challenge for the 21st century. World Health organization.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWorld Health Organization Kobe Center. Ageing and Health: A Global Challenge for the 21st Century. Belgium: World Health organization, 1999.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWorld Health Organization Kobe Center. Ageing and Health: A Global Challenge for the 21st Century. World Health organization, 1999.
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