World Health Organization. (2000). Healthy ageing development. World Health Organization.
Čikaški stil citiranja (17. izdanje)World Health Organization. Healthy Ageing Development. Geneva: World Health Organization, 2000.
MLA način citiranja (8. izdanje)World Health Organization. Healthy Ageing Development. World Health Organization, 2000.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.