Umara, U. (2018). THE EFFECT OF AUTHENTIC MATERIALS ON STUDENTS’ LISTENING PROCEDURAL TEXT ABILITY OF THE 2018/2019 NINTH YEAR STUDENTS AT SMP SWASTA DEWANTARA PUTRA SEBERTUNG. Serunai : Jurnal Ilmiah Ilmu Pendidikan, 3(2), 86–95. https://doi.org/10.37755/sjip.v3i2.34