Cita APA (7a ed.)

Buzan, B., & Hansen, L. (2009). The evolution of international security studies. Cambridge University Press.

Cita Chicago Style (17a ed.)

Buzan, Barry, y Lene Hansen. The Evolution of International Security Studies. Cambridge, UK ; New York: Cambridge University Press, 2009.

Cita MLA (9a ed.)

Buzan, Barry, y Lene Hansen. The Evolution of International Security Studies. Cambridge University Press, 2009.