APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Buzan, Barry, and Lene Hansen. The Evolution of International Security Studies. Cambridge [U.K.] ; New York, N.Y.: Cambridge University Press, 2009.

MLA (8th ed.) Citation

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