1. Microbiological Aspects of Drinking Water Supplies;Hutchinson,1977
2. Bacterial populations and indicator concepts in feces, sewage, stormwater and solid wastes;Geldreich,1978
3. Environmental monitoring using the enrichment of fecal hygiene indicators;Heitto,2012
4. Indicators of microbial water quality;Ashbolt,2001
5. American Public Health Association (APHA), 1995.