1. https://www.britannica.com/topic/quality-of-life
. Accessed 20 Sept 2019.
2. Chron World Health Organ. 1947;1(1–2):29–43. Constitution of the world health organization.
3. Torrance GW. Utility approach to measuring health -related quality of life. J Chronic Dis. 1987;40(6):593–603.
4. WHOQOL: Measuring Quality of Life.
https://www.who.int/healthinfo/survey/whoqol-qualityoflife/en/
. Accessed 20 Sept 2019.
5. https://www.cdc.gov/hrqol/concept.htm#2
. Accessed 20 Sept 2019.