Phoong Seuk Wai and Phoong Seuk Yen, Komuniti Bebas Dadah Strategi Pengurangan Risiko di Kawasan Berisiko Tinggi di Malaysia. Penerbit UTHM, 2026. Accessed: Aug. 26, 2026. [Online]. Available: https://monograph.uthm.edu.my/index.php/penerbituthm/catalog/book/580