Gaya APA

Krebs, J., Davies, N. (1991). Behavioural Ecology, An Evolutionary Approach . London and ew York: Blackwell Scientific Publications.

Gaya MLA

Krebs, J.R.., Davies, N.B.. "Behavioural Ecology, An Evolutionary Approach". London and ew York: Blackwell Scientific Publications, 1991. Text.