APA (7th ed.) Citation

Collier, P., Hoeffler, A., & Soderbom, M. (2001). On the duration of civil war. World Bank, Development Research Group, Office of the Director.

Chicago Style (17th ed.) Citation

Collier, Paul, Anke Hoeffler, and Mans Soderbom. On the Duration of Civil War. Washington, D.C: World Bank, Development Research Group, Office of the Director, 2001.

MLA (9th ed.) Citation

Collier, Paul, et al. On the Duration of Civil War. World Bank, Development Research Group, Office of the Director, 2001.