Mental Toughness and True Grit: Develop an Unbeatable Mindset, the Self-Discipline to Succeed, Achieve a Champion's Mind, the Willpower of a Navy Seal, and Become an Elite Spartan with Self-Control Mark DweckE-book2,99 €
Why We CooperateMichael Tomasello, Carol Dweck, Joan Silk, Brian Skyrms, Elizabeth S. SpelkeE-book17,65 €
