APA (7th ed.) Citation

Klabbers, J., Peters, A., & Ulfstein, G. (2009). The constitutionalization of international law. Oxford University Press.

Chicago Style (17th ed.) Citation

Klabbers, Jan, Anne Peters, and Geir Ulfstein. The Constitutionalization of International Law. Oxford [etc.]: Oxford University Press, 2009.

MLA (9th ed.) Citation

Klabbers, Jan, et al. The Constitutionalization of International Law. Oxford University Press, 2009.