Dyfyniad APA

World Health Organization Kobe Center. (1999). Ageing and health: A global challenge for the 21st century. World Health organization.

Dyfyniad Arddull Chicago

World Health Organization Kobe Center. Ageing and Health: A Global Challenge for the 21st Century. Belgium: World Health organization, 1999.

Dyfyniad MLA

World Health Organization Kobe Center. Ageing and Health: A Global Challenge for the 21st Century. World Health organization, 1999.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.