Ali@Mat Zin, A., and M. R. Varusai. “PERANAN PERPUSTAKAAN AWAM NEGERI DALAM PENGAJIAN FALAK SYARIE: KAJIAN PERBANDINGAN DI PERAK DAN SELANGOR (Roles Played by the Public Libraries in Developing the Studies of Islamic Astronomy : A Comparative Study Between Perak and Selangor State)”. Journal of Al-Tamaddun, vol. 9, no. 1, June 2014, pp. 67-81, http://jummec.um.edu.my/index.php/JAT/article/view/8671.