National Institutes of Health. Long-Term Care: Community-Based Services. NIH Senior Health. http://nihseniorhealth.gov/longtermcare/communitybasedservices/01.html. Accessed May 6, 2016.
Administration for Community Living. Supportive Services and Senior Centers Program. http://www.aoa.gov/AoA_programs/HCLTC/supportive_services/. Accessed May 6, 2016.