APA (7th ed.) Citation

Krebs, J. R. (1991). Behavioural ecology: An evolutionary approach (3. ed.). Blackwell Scientific Publ.

Chicago Style (17th ed.) Citation

Krebs, John R. Behavioural Ecology: An Evolutionary Approach. 3. ed. Oxford [u. a.]: Blackwell Scientific Publ, 1991.

MLA (9th ed.) Citation

Krebs, John R. Behavioural Ecology: An Evolutionary Approach. 3. ed. Blackwell Scientific Publ, 1991.