Elwindra, E., Agustina, A. and 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), pp. 9-18. doi: 10.56014/jphi.v4i13.175.