APA Citation

 Nicholl, D. S. T. (2008).  An introduction to genetic engineering.  Cambridge University Press.

Chicago Style Citation

 Nicholl, Desmond S. T.  An Introduction to Genetic Engineering.  Cambridge University Press, 2008.

MLA Citation

 Nicholl, Desmond S. T.  An Introduction to Genetic Engineering.  Cambridge University Press, 2008.

Warning: These citations may not always be 100% accurate.