World Helalth Organization. (2007). Global age-friendly cities: A guide. World Health Organization.
Style de citation Chicago (17e éd.)World Helalth Organization. Global Age-friendly Cities: A Guide. Geneva: World Health Organization, 2007.
Style de citation MLA (8e éd.)World Helalth Organization. Global Age-friendly Cities: A Guide. World Health Organization, 2007.
Attention : ces citations peuvent ne pas être correctes à 100%.