Ali@Mat Zin, A., K. Ismail, and M. Abdul Niri. “SEJARAH DAN FAKTOR PERKEMBANGAN ASTRONOMI ISLAM DI MALAYSIA: SATU PENELITIAN (History and Factor of Islamic Astronomy Development in Malaysia: An Analysis)”. Journal of Al-Tamaddun, vol. 10, no. 1, June 2015, pp. 1-18, http://ojie.um.edu.my/index.php/JAT/article/view/8681.