References
- Duckworth, A. (2016). Grit: The power of passion and perseverance. Scribner: New York.
- Ericsson, A., & Pool, R. (2016). Peak: Secrets from the new science of expertise. Houghton Mifflin Harcourt: New York.
- Gladwell, M. (2008). Outliers: The story of success. New York, NY: Little, Brown and Company.