- BC Health & Wellbeing. (n.d.). Do older adults need less sleep?. Retrieved March 31, 2014, from http://www.abc.net.au/health/talkinghealth/
- Changes in Sleep with Age. Division of Sleep Medicine at Harvard Medical School. 18 Dec. 2007. Web. 01 Mar. 2014.
- 2011 Census Bulletin #2 -Metro Vancouver Age Structure. (2011). Retrieved March 29, 2015, from http://www.metrovancouver.org/about/publications/Publications/2011CensusBulletin2MetroVancouverAgeStructure.pdf
- Millman, Richard. “Sleep and Aging.” Medicine and Health Rhode Island 95.3 (2012): 88. Web. 6 Mar. 2007.
- Monjan, Andrew. “Perspective on Sleep and Aging.” Frontiers in Neurology 1 (2010): 1-9. Web. 03 Mar. 2014.
- Statistics Canada. (2011). Population estimates by sex and age groups of July 1, 2011, Canada. Retrieved from http://www.statcan.gc.ca/daily-quotidien/110928/t110928a4-eng.htm.