SINAMBELA, E.; PAKPAHAN, C.; SAGALA, P. Training of Improving Students’ Speaking Skills by Using Talking Ball Game at SMA Kalam Kudus Medan. . JURNAL ABDIMAS MADUMA, [S. l.], v. 1, n. 1, p. 69–76, 2022. DOI: 10.52622/jam.v1i1.103. Disponível em: https://www.journal.eltaorganization.org/index.php/ecdj/article/view/103. Acesso em: 18 apr. 2026.