Cita APA (7a ed.)

Krebs, J. R., & Davies, N. (1981). An Introduction to behavioural ecology (3rd edition.). Blackwell.

Cita Chicago Style (17a ed.)

Krebs, John R., y N.B Davies. An Introduction to Behavioural Ecology. 3rd edition. Oxford: Blackwell, 1981.

Cita MLA (8a ed.)

Krebs, John R., y N.B Davies. An Introduction to Behavioural Ecology. 3rd edition. Blackwell, 1981.