APA (7th ed.) Citation

Wallensteen, P. (2002). Understanding conflict resolution: War, peace, and the global system. Sage.

Chicago Style (17th ed.) Citation

Wallensteen, Peter. Understanding Conflict Resolution: War, Peace, and the Global System. London: Sage, 2002.

MLA (9th ed.) Citation

Wallensteen, Peter. Understanding Conflict Resolution: War, Peace, and the Global System. Sage, 2002.