Mohd Nawawi, M. S. A., S. Man, M. Z. Zainuddin, R. Abdul Wahab, and N. Ahmad Zaki. “SEJARAH KRITERIA KENAMPAKAN ANAK BULAN DI MALAYSIA (History of the Criteria for Lunar Crescent Visibility in Malaysia)”. Journal of Al-Tamaddun, vol. 10, no. 2, Dec. 2015, pp. 61-75, https://ijie.um.edu.my/index.php/JAT/article/view/8690.