1. Aging in other countries and across cultures in the United States;Hooyman,2011
2. Get ready-the age-quake is heading our way. Need for major changes seen to care for aging population;Miller;The Baltimore Sun,1991
3. World Population Ageing 2015,2015
4. Why Population Aging Matters—A Global Perspective;Dobriansky,2007
5. Attitudes about Aging: A Global Perspective;Kochhar,2014