APA

Walker C., Sibely R., Hopkin S. & Peakall D. (2012). Principles of ecotoxiology. London: CRC Press.

Chicago

Walker C.H, Sibely R.M, Hopkin S.P and Peakall D.B. 2012. Principles of ecotoxiology. London: CRC Press.

Harvard

Walker C., Sibely R., Hopkin S. and Peakall D. (2012). Principles of ecotoxiology. London: CRC Press.

MLA

Walker C.H, Sibely R.M, Hopkin S.P and Peakall D.B. Principles of ecotoxiology. London: CRC Press. 2012.