ESCAP, “Private enterprise development for export promotion in south Asia,” United Nations Economic And Social Council, Fourteenth meeting 2–4, December 2002.
 M. N. A. Khan, P. Datta, A. S. M. Dakua, and S. I., “An assessment of Water Quality Deterioration of the River Kushiara due to Effluent Discharge from Natural Gas Fertilizer Factory,” B. Sc. Engg. Thesis, CEE Dept, Shah Jalal University of Science & Tech., Sylhet., 2002.
 USEPA, “Agency Quality Criteria for Water,” EPA # 440/5-86-001, US Environmental Protection Agency, Washington, DC. 1986.
 DOE, “The Environment Conservation Rules,” Department of Environment, Ministry of Environment and Forest, Government of the People’s Republic of Bangladesh, 1997.
 U. Dhar and M. Rahman, “Surface water quality modeling: A case study on Kushiara River,” B.Sc. Engg. Thesis, CEE Dept, Shah Jalal University of Science & Tech., Sylhet, 2006.
 M. Kavanaugh, and R. R. Trussell, “Design of aeration towers to strip volatile contaminants from drinking water,” Journal AWWA, pp. 684–692, December 1980.
 H. Shulka, and R. E. Hicks, “Process design manual for stripping of organics,” EPA-600/2-84-139, 1984.
 E. Mead and J. Leibbert, “A comparison of packed -column and low-profile sieve tray air strippers,” Proceedings of the 1998 Conference on Hazardous Waste Research, 1998.
 W. Ball, M. D. Jones, and M. C. Kavanaugh, “Mass transfer of volatile organic compounds in packed tower aeration,” J. Water Pollution Control Federation, Vol. 56, No. 2, pp. 127–136, 1984.
 J. M. Montgomery, Consulting Engineers Inc., “Water treatment principles & design,” John Wiley & Sons, New York, pp. 237–261, 1985.
 R. Treybal, “Mass-transfer operations,” McGraw-Hill, New York, 3rd ed., pp. 275–313, 1980.
 L. Culp, Wesner, M. George and L. Culp, “Handbook of advanced wastewater treatment,” 2nd ed., Van Nostrand Reinhold Co., New York, 1978.
 P. H. Liao, A. Chen and K. V. Lo, “Removal of nitrogen from swine manure wastewaters by ammonia stripping,” Bioresource Technology 54, Elsevier Science Limited, Great Britain, pp. 17–20, 1995.
 USEPA, “Wastewater technology fact sheet ammonia stripping,” EPA 832-F-00-019 US Environmental Protection Agency, Washington, D. C., 2000.
 USEPA, “Nitrogen removal by ammonia stripping,” EPA/670/2-73-040, US Environmental Protection Agency, Washington, D. C., 1973.
 Jaeger Products, Inc., 1611 Peachleaf, Houston, TX 77039, firstname.lastname@example.org/1006foul.htm.
 S. C. Bhatia, “Environmental pollution and control in chemical process industries,” Khanna Publishers, Delhi, pp. 644–651, 2001.