1. Afshin, A., Forouzanfar, M., Retisma, M., Sur, P., Estep, K., Lee, A., et al. (2017). Health effects of overweight and obesity in 195 countries over 25 years. New England Journal of Medicine, 377, 213–227.
2. American Psychological Association. (2002). Ethical principles of psychologists and codes of conduct. Washington, DC: American Psychological Association.
3. Andersen, M., & Williams, J. (1986). A model of stress and athletic injury: Prediction and prevention. Journal of Sport and Exercise Psychology, 10, 294–306.
4. Association for Applied Sport Psychology. (2010). AASP code of principles and standards. Retrieved from http://www.appliedsportpsych.org/about/ethics.
5. Atkinson, J. (1974). The mainstream of achievement-oriented activity. In J. Atkinson & J. Raynor (Eds.), Motivation and achievement (pp. 13–42). New York: Halstead.