Cita APA (7a ed.)

Richelle, M., & Lejeune, H. (1980). Time in animal behaviour. Pergamon Press.

Cita Chicago Style (17a ed.)

Richelle, Marc, y Helga Lejeune. Time in Animal Behaviour. Oxford ; New York: Pergamon Press, 1980.

Cita MLA (8a ed.)

Richelle, Marc, y Helga Lejeune. Time in Animal Behaviour. Pergamon Press, 1980.