The Correlation between Self-Efficacy, Grade, and Sex on the Intention to Participate in Peer-Education Activities in Drug Abuse Prevention - Nurmala, Ira; Li, Chung Yi; Pertiwi, Elisa Dwi; Puspita Devi, Yuli; Muthmainnah, Muthmainnah; Rachmayanti, Riris Diana (Iranian Journal of Public Health, 2022)