Asty, H, E Kemal, Siska ., and Afdaleni . 2019. “Design and Development Stage of Interactive CD-Based Audio Visual Media Development for Improving the Listening Skill on Listening Subject in STKIP PGRI West Sumatera”. KnE Social Sciences 3 (14), 332–339. https://doi.org/10.18502/kss.v3i14.4319.