APA (7th ed.) Citation

Krebs, J. R., & Davies, N. B. (2001). Behavioural ecology: An evolutionary approach (4th ed., repr.). Blackwell Science.

Chicago Style (17th ed.) Citation

Krebs, J. R., and N. B. Davies. Behavioural Ecology: An Evolutionary Approach. 4th ed., repr. Oxford [etc.]: Blackwell Science, 2001.

MLA (9th ed.) Citation

Krebs, J. R., and N. B. Davies. Behavioural Ecology: An Evolutionary Approach. 4th ed., repr. Blackwell Science, 2001.