SUNGGU, Ruth Cahaya Op.; PURBA, Jon Roi Tua; BARUS, Maria. The Effectiveness of Teamwork in Kasti Ball Sports Among Grade IV Students . Jurnal Ilmu Sosial dan Humaniora , [S. l.], v. 3, n. 4, p. 454–465, 2025. DOI: 10.58540/isihumor.v3i4.1273. Disponível em: https://www.putrapublisher.org/index.php/isihumor/article/view/1273. Acesso em: 11 jun. 2026.