MAJID, A. M. IMPROVING STUDENTS’ ABILITY IN EXPRESSING OPINION THROUGH GROUP INVESTIGATION AT THE STUDENTS CLASS XI IPA 1 SEMESTER 1 SMA NEGERI 1 ABUNG SEMULI ACADEMIC YEAR 2016-2017. Edukasi Lingua Sastra, Indonesia, v. 16, n. 1, p. 110–117, 2018. DOI: 10.47637/elsa.v16i1.82. Disponível em: https://jurnal.umko.ac.id/index.php/elsa/article/view/82. Acesso em: 6 may. 2024.