SIMAMORA, Erni Lamria. UPAYA PENINGKATAN AKTIVITAS BELAJAR MELALUI MODEL GROUP INVESTIGATION MATA PELAJARAN BAHASA INDONESIA KELAS VII-7 SMPN 1 NAMORAMBE. JURNAL HANDAYANI PGSD FIP UNIMED, [S. l.], v. 6, n. 2, p. 111–117, 2017. DOI: 10.24114/jh.v6i2.6524. Disponível em: http://103.242.233.34/index.php/handayani/article/view/6524. Acesso em: 31 jan. 2025.