World Health Organization. (2000). Healthy ageing development. World Health Organization.
Chicagoスタイル(17版)引用形式World Health Organization. Healthy Ageing Development. Geneva: World Health Organization, 2000.
MLA(8版)引用形式World Health Organization. Healthy Ageing Development. World Health Organization, 2000.
警告: この引用は必ずしも正確ではありません.