World Health Organization Kobe Center. (1999). Ageing and health: A global challenge for the 21st century. World Health organization.
Chicago Style (17. basım) AtıfWorld Health Organization Kobe Center. Ageing and Health: A Global Challenge for the 21st Century. Belgium: World Health organization, 1999.
MLA (8th ed.) AtıfWorld Health Organization Kobe Center. Ageing and Health: A Global Challenge for the 21st Century. World Health organization, 1999.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..