Smith, Melinda, Lawrence Robinson, and Jeanne Segal. "Depression in Older Adults and the Elderly." Helpguide.org: A Trusted Non-Profit Resource. (2013): n. page. Web. 1 Dec. 2013. . (Smith, Robinson, and Segal )
10. Janice, Lloyd. "Keeping the elderly upright and mobile." USA Today n.d.: Academic Search Premier. Web. 1 Dec. 2013. (Janice)
11. Schneider, Jodi. "Coping With A Spouse 's Death." U.S. News & World Report 134.19 (2003): 58. Business Source Elite. Web. 1 Dec. 2013. (Schneider)
12. Singh, Archana, and Nichi Misra. "Loneliness, depression and sociability in old age." Industrial Psychiatry Journal. 18.1 (2009): 51. Web. 1 Dec. 2013. . (Singh, and Misra 51)
13. Keiley, Lynn. "The Secret To Stress Relief." Mother Earth News 216 (2006): 68-71. Academic Search Premier. Web. 1 Dec. 2013. (Keiley)
14. Ernst, Carl, Andrea K. Olson, et al. "Antidepressant effects of exercise: Evidence for an adult-neurogenesis hypothesis?." Journal of Psychiatry and Neuroscience. 31.2 (2006): 84. Web. 1 Dec. 2013. . (Ernst, Olson, and et al 84)
15. Bouchez, Colette, and Brunilda Nazario, eds. "Serotonin and Depression: 9 Questions and Answers." WebMD. WebMD LLC, 2013. Web. 15 Nov 2013. . (Bouchez, and Nazario)
16. DUPLICATE Successful Aging. USC Leonard Davis School of Gerontology, Web. . ("Successful Aging"