1. Alvarez, Shane, Wedad Zainoden, Mohammad Abdullatif, Lani Marie Alamban, Sohali Laguindab, Norahinar Mamari, Dhan Michelle Itao and Haidee Modehar. (2008). A cross-sectional study on the extent of fecal contamination of Cagayan de Oro River along five urban barangays and the factors affecting contamination. (October 2007 - January 2008). JPAIR Journal.
2. Boothman, S. Mansfield, J. Weston, L. (2002). Sources of Fecal Coliform Pollution within the Manly Lagoon Catchment. In: UTS Freshwater Ecology Report 2002, Department of Environmental Sciences, University of Technology, Sydney. page 5
3. Bracken L, Hendricks C, Harding A. Apparent bias in river water inoculums following centrifuge. J. Microbiological methods.2006;67(2):304–309.
4. Deauna, M. C. & S. L. Dorado (1996). Environmental science for Philippines schools.927 Quezon Avenue, Philippines Phoenix Publishing House Inc.
5. Department of Environment and Natural Resources (DENR) - Region 10. Standard methods for examination of water and wastewater.