Ilyas, M. (1992). World Conference on the International Islamic Calendar: The Astronomical Research Unit University of Science Malaysia, Penang, Malaysia Rabi- al Awwal 29 - Rabi al Akhir 1,1412 October 8-10,1992. American Journal of Islam and Society, 9(3), 432–434. https://doi.org/10.35632/ajis.v9i3.2587