Malemna br. Barus S, Juanita, Zulfendri. Qualitative Study of the Non–Smoking Areas Policy Implementation in Junior High Schools at Labuhan Batu Selatan Regency. ijhes [Internet]. 2024Jun.29 [cited 2026Oct.7];7(6):26-0. Available from: https://ijhes.com/index.php/ijhes/article/view/337