Dahlan ND, Muhamad TA. Mental toughness and academic achievement among footballers at National University of Malaysia: Kekuatan mental dan prestasi akademik atlet bola sepak Universiti Kebangsaan Malaysia. JSSPJ [Internet]. 2017 May 5 [cited 2024 Apr. 29];6(1):21-35. Available from: https://ejournal.upsi.edu.my/index.php/JSSPJ/article/view/945