Ratledge, C., & Kristiansen, B. (2002). Basic biotechnology (2nd ed.). Cambridge University Press.

Ratledge, Colin, and B. Kristiansen. Basic Biotechnology. 2nd ed. Cambridge, U.K. ; New York: Cambridge University Press, 2002.

Ratledge, Colin, and B. Kristiansen. Basic Biotechnology. 2nd ed. Cambridge University Press, 2002.