AbdulJabbar MA. The Effect of a Proposed Psychological Training Program on Reducing Competitive Anxiety and Developing Psychological Hardiness among First-Division Handball Players. j. pendidik. dasar. aktifitas. jasm [Internet]. 2026 Oct. 2 [cited 2026 Oct. 6];6(2):34-45. Available from: https://journal.uny.ac.id/index.php/jpdaj/article/view/102437