The Implementation of Group Investigation to Improve the Students’ Speaking Skill. Dinamika Ilmu, [S. l.], v. 16, n. 2, p. 245–261, 2016. DOI: 10.21093/di.v16i2.551. Disponível em: https://journal.uinsi.ac.id/index.php/dinamika_ilmu/article/view/551. Acesso em: 24 jul. 2026.