MARPAUNG, Arie Favian Syahmar; SUDRADJAT WIRADIHARDJA; KURNIA TAHKI. THE EFFECT OF ANXIETY, CONFIDENCE, AND MOTIVATION ON THE PERFORMANCE OF NATIONAL VOLLEYBALL REFEREE PROVINCE OF NORTH SUMATRA. Gladi : Jurnal Ilmu Keolahragaan, [S. l.], v. 12, n. 05, p. 403–411, 2021. DOI: 10.21009/GJIK.125.07. Disponível em: https://journal.unj.ac.id/unj/index.php/gjik/article/view/22422. Acesso em: 22 nov. 2024.