Hasibuan, S. A. . (2021) “IMPROVING STUDENT’S SPEAKING SKILL BY USING BRAINSTORMING METHOD OF THE TENTH GRADE IN SMA UNGGULAN UMMU RAHMAH IN 2020/2021”, Pedagogi: Jurnal Ilmiah Pendidikan, 7(2), hlm. 88–92. doi: 10.47662/pedagogi.v7i2.317.