HASANAH, D. H. U.; MURTIATI, T.; RAHAYU, S. The Effect of Narcotics, Psychotropic, and Addictive Substance Counseling toward SMK Students Knowledge about Drug Abuse. Biosfer: Jurnal Pendidikan Biologi, v. 7, n. 2, p. 4-9, 18 Jan. 2018.