Collier, P., Hoeffler, A., & Seoderbom, M. (2001). On the duration of civil war. World Bank.
Cita Chicago (17th ed.)Collier, Paul, Anke Hoeffler, i Means Seoderbom. On the Duration of Civil War. Washington, D.C: World Bank, 2001.
Cita MLA (9th ed.)Collier, Paul, et al. On the Duration of Civil War. World Bank, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.