Akbar, A. ., and R. . Kurniawan. “Peran Servant Leadership Pelatih Terhadap Kecemasan Bertanding Atlit Student”. Jurnal Pendidikan Tambusai, vol. 5, no. 2, July 2021, pp. 2701-6, https://jptam.org/index.php/jptam/article/view/1283.