Elwindra, E., Agustina, A., & Umar, A. (2017). Effectiveness of Counseling Using Slide Shows And Video Clips on Narcotics Towards The Knowledge and Attitude of Grade 9 Students of SMPN 1 Kaur District. Jurnal Persada Husada Indonesia, 4(13), 9-18. https://doi.org/10.56014/jphi.v4i13.175