Masanda, Argel B. “Designing a Positive Psychological Intervention (PPI) Program for Persons Who Use Drugs (PWUDs)”. International Journal of Multidisciplinary: Applied Business and Education Research 4, no. 7 (July 28, 2023): 2677–2690. Accessed April 19, 2026. https://www.ijmaberjournal.org/index.php/ijmaber/article/view/995.