Haji Othman, M. K. “Keberkesanan Pengajaran Kursus Titas 1: Kajian Di Universiti Teknologi Mara, Shah Alam”. Jurnal Usuluddin, vol. 20, Dec. 2004, pp. 159-84, https://ajap.um.edu.my/index.php/JUD/article/view/4216.