APA
Ryan K. J. &. R. C. G. (., . (2014). Sherris medical microbiology 6th ed. McGraw hill education Medical: New York.
Chicago
Ryan Kenneth J & Ray C George (eds), . 2014. Sherris medical microbiology 6th ed. McGraw hill education Medical: New York.
Harvard
Ryan K. J. &. R. C. G. (., . (2014). Sherris medical microbiology 6th ed. McGraw hill education Medical: New York.
MLA
Ryan Kenneth J & Ray C George (eds), . Sherris medical microbiology 6th ed. McGraw hill education Medical: New York. 2014.