Hasanah, Dwiatri Harjanti Uswatun, Tri Murtiati, and Sri Rahayu. 2018. “The Effect of Narcotics, Psychotropic, and Addictive Substance Counseling Toward SMK Students Knowledge about Drug Abuse”. Biosfer: Jurnal Pendidikan Biologi 7 (2), 4-9. https://doi.org/10.21009/biosferjpb.7-2.2.