1. Ammons, D.K. (1990). Unique identity of the World Games for the deaf. Palaestra, 6, 40-43.
2. Bowling, A. (2005). Measuring health: A review of quality f life measurement scales (3rd Ed.). Berkshire, UK: Open University Press, McGraw-Hill Education.
3. Cohen, J. (1988). Statistical power analysis for the behavioral sciences (2nd ed.). Hillsdale, NJ: Lawrence Erlbaum Associates, Publishers.
4. Galloway, S., Bell, D., Hamilton, C., & Scullion, A. (2006). Quality of life and well-being: Measuring the benefits of culture and sport: Literature review and thinkpiece. Edinburgh: Analytical Services Division, Scottish Executive Education Department.
5. Kamelska, A.M., & Mazurek, K. 2015. The assessment of the quality of life in visually impaired people with different level of physical activity. Physical Culture and Sport. Studies and Research, 67(1), 31-41.