APA
DESA, . (2007). World economic and social survey 2007 : development in an ageing world. Academic Foundation, New Delhi: .
Chicago
DESA, . 2007. World economic and social survey 2007 : development in an ageing world. Academic Foundation, New Delhi: .
Harvard
DESA, . (2007). World economic and social survey 2007 : development in an ageing world. Academic Foundation, New Delhi: .
MLA
DESA, . World economic and social survey 2007 : development in an ageing world. Academic Foundation, New Delhi: . 2007.