Massoud, M.A., Tarhini, A. and Nasr, J.A. (2009) Decentralized Approaches to Wastewater Treatment and Management: Applicability in Developing Countries. Journal of Environmental Management, 90, 652-659.
 Vigneswaran, S. and Sundaravadivel, M. (2004) Recycle and Reuse of Domestic Wastewater. Wastewater Recycle, Reuse, and Reclamation. Encyclopedia of Life Support Systems (EOLSS) (Developed under the Auspices of the UNESCO), Eolss Publishers, Oxford.
 Ferreira, A.-C., Morais, P.V. and Costa, M.S.D. (1994) Alterations in Total Bacteria, Iodonitrophenyltetrazolium (INT)-Positive Bacteria, and Heterotrophic Plate Counts of Bottled Mineral Water. Canadian Journal of Microbiology, 40, 72-77.
 Obiri-Danso, K.A., Okore-Hanson, A. and Jones, K. (2003) The Microbiological Quality of Drinking Water Sold on the Streets in Kumasi, Ghana. Letters in Applied Microbiology, 37, 34-339.
 Bartram, J., Cotruvo, J., Exne, M., Fricker, C. and Glasmacher, A. (2004) Heterotrophic Plate Count Measurement in Drinking Water Safety Management: Report of an Expert Meeting Geneva, 24-25 April 2002. International Journal of Food Microbiology, 92, 241-247.
 Pavlov, D., de Wet, C.M.E., Grabow, W.O.K. and Ehlers, M.M. (2004) Potentially Pathogenic Features of Heterotrophic Plate Count Bacteria Isolated from Treated and Untreated Drinking Water. International Journal of Food Microbiology, 92, 275-287.
 Singh, J.M., Somashekar, R.K., Prakash, K.L. and Shivanna, K. (2009) Bacteriological Assessment of Groundwater in Arkavathi and Vrishabhavathi Basins, Bangalore, Karnataka. Journal of Ecology and the Natural Environment, 1, 156-159.
 Nwadiaro, C.S., Oranusi, N.A. and Umeham, S.N. (1982) Preliminary Survey of Drinking Water Quality of Some Areas in Imo and Rivers States in Nigeria. Proceedings of 3rd National Conference on Water Pollution, The Petroleum Inspectorate, NNPC and Federal Ministry of Works, Port Harcourt, December 1982, 40-49.
 Ashbolt, N.J. Grabow, W.O.K. and Snozzi, M. (2001) Indicators of Microbial Water Quality. In: Fewtrell, L., Bartram, J., Eds., Water Quality: Guidelines, Standards and Health Risk Assessment and Management for Water-Related Infectious Disease (Chapter 13). IWA Publishing, London, 289-315.