Malemna br. Barus, Sri, Juanita, and Zulfendri. “Qualitative Study of the Non–Smoking Areas Policy Implementation in Junior High Schools at Labuhan Batu Selatan Regency”. International Journal of Health, Education & Social (IJHES) 7, no. 6 (June 29, 2024): 26-40. Accessed November 2, 2026. https://licensi.org/index.php/ijhes/article/view/337.