WHO(world health organization). (2005). Healthy ageing: Practical pointers on keeping well. WHO.
シカゴスタイル引用形WHO(world health organization). Healthy Ageing: Practical Pointers on Keeping Well. Geneva: WHO, 2005.
MLA引用形式WHO(world health organization). Healthy Ageing: Practical Pointers on Keeping Well. WHO, 2005.
警告: この引用は必ずしも正確ではありません.