PERCEPTION OF PICTORIAL HEALTH WARNING ON CIGARETTE PACKS, SMOKING BEHAVIOUR AND WANT TO QUIT SMOKING AMONG STUDENTS UNDERGRADUATE OF STATE ISLAMIC UNIVERSITY OF NORTH SUMATERA, INDONESIA. Proceedings of the ICASH [Internet]. 2019 Aug. 25 [cited 2026 Jul. 27];(4):1001-8. Available from: https://www.inschool.id/publications/index.php/icash/article/view/726