1. Bandura, A. (1997). Self-efficacy: The exercise of self-control. New York: W.H. Freeman.
2. Barrett, A. E. (2005). Gendered experiences in midlife: Implications for age identity. Journal of Aging Studies, 19(2), 163–183. doi: 10.1016/j.jaging.2004.05.002 .
3. Bogdan, R. C., & Biklen, S. K. (2007). Qualitative research in education: An introduction to theory and methods (4th ed.). Boston: Allyn and Bacon.
4. British Columbia Ministry of Health. (2004). Social isolation among seniors: An emerging issue. Children’s, Women’s and Seniors Health Branch, British Columbia Ministry of Health. Retrieved June 7, 2021 from http://www.health.gov.bc.ca/library/publications/year/2004/Social_Isolation_Among_Seniors.pdf .
5. Charmaz, K. (2006). Constructing grounded theory: A practical guide through qualitative analysis. London: Sage.