World economic and social. (2007). Development in an ageing world. United nations.
Чикаго маягийн жагсаалтWorld economic and social. Development in an Ageing World. New York: United nations, 2007.
MLA ишлэлWorld economic and social. Development in an Ageing World. United nations, 2007.
Warning: These citations may not always be 100% accurate.