Carol S. Dweck, Self -Theories: Their Role in Motivation, Personality, and Development (Psychology Press, 2000), p. 17.
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Carol S. Dweck, p. 17.
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Angela L. Duckworth, Christopher Peterson, Michael D. Matthews and Dennis R. Kelly, «Grit: Perserverance and Passion for Long-Term Goals,» Journal of Personality and Social Psychology, Vol. 92 (January 2007).
