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Malemna br. Barus, S., Juanita and Zulfendri 2024. 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, 6 (Jun. 2024), 26-40. DOI:https://doi.org/10.1234/ijhes.v7i6.337.