HENA TRIANA; MUKHTAR. PENERAPAN MODEL PEMBELAJARAN GROUP INVESTIGATION (GI) BERBANTUAN ALAT PERAGA UNTUK MENINGKATKAN KEMAMPUAN KOMUNIKASI MATEMATIS DI SMPN 1 LABUHAN DELI. Journal of Student Research, [S. l.], v. 2, n. 1, p. 263–275, 2024. DOI: 10.55606/jsr.v2i1.2085. Disponível em: https://scientivapress.org/index.php/jsr/article/view/2085. Acesso em: 12 may. 2026.