Chairani Annisa, Reflinda Reflinda, Melyan Melani and Veni Roza (2022) “The Effect of Using Picture Series toward Students’ Speaking Skill at the Second Grade in MTSS Nagari Binjai”, Populer: Jurnal Penelitian Mahasiswa, 1(4), pp. 19–33. doi: 10.58192/populer.v1i4.248.