Silalahi, T., and R. Napitu. “IMPROVING STUDENTS’ SPEAKING SKILL BY USINGWORD WALLMEDIA AT THE SEVENTH GRADE STUDENTS OF SMP NEGERI 10 PEMATANGSIANTAR IN THE ACADEMIC 2019/2020”. Bilingual : Jurnal Pendidikan Bahasa Inggris, vol. 3, no. 2, Oct. 2021, pp. 111-20, doi:10.36985/jbl.v3i2.272.