Cita APA (7a ed.)

World Helalth Organization. (2007). Global age-friendly cities: A guide. World Health Organization.

Cita Chicago Style (17a ed.)

World Helalth Organization. Global Age-friendly Cities: A Guide. Geneva: World Health Organization, 2007.

Cita MLA (8a ed.)

World Helalth Organization. Global Age-friendly Cities: A Guide. World Health Organization, 2007.