Kamaruddin, Z., and W. Z. K. Wan Ali. “An Analysis of SIS’s Understanding of Ijtihād from an Islamic Thought Perspective”. Afkar: Jurnal Akidah Dan Pemikiran Islam, vol. 13, no. 1, June 2012, pp. 33-50, http://adum.um.edu.my/index.php/afkar/article/view/5763.