IMPROVING STUDENTS’ SPEAKING SKILLBY USINGWORD WALLMEDIA AT THE SEVENTHGRADESTUDENTS OF SMP NEGERI 10 PEMATANGSIANTAR INTHE ACADEMIC 2019/2020. jbl [Internet]. 25 Oktober 2021 [dikutip 31 Oktober 2025];3(2):111-20. Tersedia pada: http://jurnal.usi.ac.id/index.php/jbl/article/view/1001