SOMPHONG, S., PRACHAKUL, W. and SAMAHITO, S. (2012) “THE CONSTRUCTION OF A MENTAL TOUGHNESS MEASURE FOR TAEKWONDO ATHLETES”, Journal of Sports Science and Technology, 11(2), pp. 260–273. available at: https://he01.tci-thaijo.org/index.php/JSST/article/view/44020 (accessed: 22 April 2026).