Hutagaol, P. (2021) “Pengaruh Model Pembelajaran Group Investigation Terhadap Hasil Belajar Siswa Pada Materi Pencemaran Lingkungan Di Kelas X SMA Negeri 2 Bandar Tahun Pelajaran 2020/2021: The Influence of the Group Investigation Learning Model on Student Learning Outcomes On Environmental Pollution Materials in Class X SMA Negeri 2 Bandar Academic Year 2020/2021”, MetaBio : Jurnal Pendidikan (Edisi Elektronik), 3(1), pp. 40–45. doi: 10.36985/jmo.v3i1.31.