Ratledge, C., & Kristiansen, B. (2001). Basic biotechnology (2nd ed.). Cambridge University Press.

Ratledge, Colin, and B. Kristiansen. Basic Biotechnology. 2nd ed. Cambridge, U.K. ; New York, NY: Cambridge University Press, 2001.

Ratledge, Colin, and B. Kristiansen. Basic Biotechnology. 2nd ed. Cambridge University Press, 2001.