Sidik@Mat Sidek, R., and N. Mohd Talib. “PERKEMBANGAN SAINS TABI’I ISLAM ERA UTHMANIYYAH”. Journal of Al-Tamaddun, vol. 8, no. 2, Dec. 2013, pp. 37-47, http://adum.um.edu.my/index.php/JAT/article/view/8660.