Boran, S., Nabkasorn, C. and Vatanasin, D. 2019. The Effects of Supportive Group Psychotherapy on Perceived Self-efficacy and Intention to Drug Abstinence among Adolescents with Amphetamine Addiction. Journal of Phrapokklao Nursing College, Chanthaburi. 30, 1 (May 2019), 173–187.