The Application of Group Discussion Method to Improvr the Students’ Achievement on Speaking Skills of Seventh Grade at SMPN 4 Pematangsiantar. jbl [Internet]. 29 Oktober 2025 [dikutip 31 Oktober 2025];7(2):111 – 119. Tersedia pada: http://jurnal.usi.ac.id/index.php/jbl/article/view/1998