Majid, A. M. (2018) “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, 16(1), pp. 110–117. doi: 10.47637/elsa.v16i1.82.