Maulinsari, P.G. and Purnama, D.S. 2022. Assertive Behavior Development for Drug Abuse Prevention through Group Guidance Services. AL-ISHLAH: Jurnal Pendidikan. 14, 3 (Jul. 2022), 3537–3544. DOI:https://doi.org/10.35445/alishlah.v14i3.1737.