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. USA, 9(3), pp. 432–434. doi: 10.35632/ajis.v9i3.2587.