Katmun@Katmon, N., S. R. Zakaria, and M. A. Jusoh. “FAKTOR PENENTU MASALAH DISIPLIN DALAM KALANGAN PELAJAR SEKOLAH MENENGAH DI WILAYAH PERSEKUTUAN: FACTORS THAT INFLUENCE DISCIPLINE PROBLEMS AMONG SECONDARY SCHOOL STUDENTS IN THE FEDERAL TERRITORY OF KUALA LUMPUR”. Management Research Journal, vol. 3, Oct. 2014, pp. 140-54, https://ejournal.upsi.edu.my/index.php/MRJ/article/view/1522.