Siahaan, Mungkap Mangapul. 2020. “A CASE STUDY: IMPROVING STUDENTS’ SPEAKING ABILITY THROUGH PICTURESIN SMK SWASTA TAMAN PENDIDIKAN”. Bilingual : Jurnal Pendidikan Bahasa Inggris 2 (2):43-59. https://doi.org/10.36985/jbl.v2i2.248.