Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.