World Health Organization Kobe Center. (1999). Ageing and health: A global challenge for the 21st century. World Health organization.
Chicago-Zitierstil (17. Ausg.)World Health Organization Kobe Center. Ageing and Health: A Global Challenge for the 21st Century. Belgium: World Health organization, 1999.
MLA-Zitierstil (8. Ausg.)World Health Organization Kobe Center. Ageing and Health: A Global Challenge for the 21st Century. World Health organization, 1999.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.