Widhi Harita, Adiwignya Nugraha, Suryanto Suryanto, and Rahkman Ardi. “Effect of Mindfulness Sport Performance Enhancement (MSPE) to Reduce Competitive State Anxiety on Karate Athletes”. Jurnal SPORTIF : Jurnal Penelitian Pembelajaran 8, no. 2 (August 30, 2022): 169 - 188. Accessed February 6, 2023. https://ojs.unpkediri.ac.id/index.php/pjk/article/view/17807.