“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 International Conference on Applied Science and Health, no. 4 (August 25, 2019): 1001–1008. Accessed February 13, 2025. https://publications.inschool.id/index.php/icash/article/view/726.