Cita APA (7th ed.)

Tinbergen, N. (1969). The study of instinct (1st ed. 2nd impression.). Clarendon P..

Cita Chicago (17th ed.)

Tinbergen, Niko. The Study of Instinct. 1st ed. 2nd impression. Oxford: Clarendon P., 1969.

Cita MLA (8th ed.)

Tinbergen, Niko. The Study of Instinct. 1st ed. 2nd impression. Clarendon P., 1969.