REFERENCE

REFERENCES Atlas, R.M. (1995). Microorganisms in Our World. Mosby Year Book.  Inc.  Medigan, M.T. et al. (2009). Brock Biology of Microorganisms. 12th  Edition. Pearson Education Inc.    Pelczar, M.J., Chan, E.C.S. & Krieg, R.N. (2001). Microbiology. 5th    Edition. McGraw-Hill.  Willey, J.M., Sherwood, L.M & Woolverton, C.J. (2008). Microbiology.    7th Edition. Boston Bur Bridge, IL: McGraw-Hill Higher    Education.