Nachiappan, S. “Analysis of Contributing Factors Towards Misuse of Drugs and Rehabilitation Efforts in Terms of Cognition in PENGASIH Centres, Malaysia: Analisis Faktor Penyumbang Terhadap Penyalahgunaan Dadah Dan Usaha Pemulihan Dari Segi Kognisi Di Pusat PENGASIH Malaysia”. EDUCATUM Journal of Social Sciences, vol. 1, no. 1, Oct. 2015, pp. 34-39, https://ejournal.upsi.edu.my/index.php/EJOSS/article/view/82.