1. The World Health Organization. (1997) WHOQOL: Measuring quality of life. https://www.who.int/healthinfo/survey/whoqol-qualityoflife/en/. Retrieved 1 Sept 2020.
2. Schalock, R. L. (2004). The concept of quality of life: What we know and do not know. Journal of intellectual disability research, 48(3), 203–216.
3. Galloway, S., Bell, D., Hamilton, C., & Scullion, A. C. (2006). ’ "Well-being and quality of life: Measuring the benefits of culture and sport-a literature review and thinkpiece. Edinburgh: Scottish Government.
4. Locke, E. A., Shaw, K. N., Saari, L. M., & Latham, G. P. (1981). Goal setting and task performance: 1969–1980. Psychological Bulletin, 90(1), 125.
5. Austin, J. T., & Vancouver, J. B. (1996). Goal constructs in psychology: Structure, process, and content.". Psychological Bulletin, 120(3), 338.