1. Green RH 1979. Sampling design and statistical methods for environmental biologists. John Wiley & Sons, New York.

2. UNEP 1995. Global biodiversity assessment, Cambridge University Press, Cambridge.

3. Underwood  AJ 1997. Experiments in ecology, their  logical design and interpretation using analysis of variance. Cambridge University Press, New York.

There are also several recent literature, but I hope the ones I have listed are good enough for the purpose.