Nyi Nyi Naing, Zulkifli Ahmad, Wan Maizurin Wan Yusoff, and Wan Mohd Zani Wan Hassan, “Smoking and discipline problems among rural secondary school students in Kelantan”, Malays J Med Sci, vol. 4, no. 1, pp. 54–58, Jan. 1997, doi: 10.21315/.