1. United Nations Environment Program (UNEP). Global environment outlook 2000, (1999). Earthscan, UK.
2. Evaluation of the seasonal variation on the geochemical parameters and quality assessment of the groundwater in the proximity of River Cooum, Chennai;Giridharan;India. Environmental Monitoring and Assessment,2008
3. Ismail T and Anuar S. Potential of groundwater contamination in North Kelantan. In Procedings of Seminar Geofizik Kejuruteraan dan Sekitaran 2010, 6 Januari 2010, Program Geologi, PPSSSA, FST, UKM 2010. p.155-163.
4. Department of Statistics Malaysia. Malaysia Population and Housing Census of Malaysia, Preliminary Count Report, 2010.
5. Bosch JHA. Young Quaternary sediments in the coastal plain of Kelantan, Peninsular Malaysia. Geological survey of Malaysia. Report No. QG/2, 42; 1986.