World Health Organisation. (1989). Health of the elderly World Health organisation. World Health Organisation.
シカゴスタイル引用形World Health Organisation. Health of the Elderly World Health Organisation. Geneva: World Health Organisation, 1989.
MLA引用形式World Health Organisation. Health of the Elderly World Health Organisation. World Health Organisation, 1989.
警告: この引用は必ずしも正確ではありません.