1. The Treasure Chest: A Heritage Album Containing 1064 Familiar and Inspirational Quotations, Poems, Sentiments, and Prayers From Great Minds of 2500 Years;John Adams as quoted in Wallis CL, ed,1965
2. Demographics and Living Arrangements: 2013, Household Economic Studies, Current Population Reports;Schondelmyer,2017
3. Table 3. Projections of the Population by Sex and Selected Age Groups for the United States: 2015 to 2016 [Data file];U.S. Census Bureau,2014
4. Healthy Aging in Action;National Prevention Council,2016
5. The Baby Boom Cohort in the United States: 2012 to 2060 Population Estimates and Projections, Current Population Reports;Colby,2014