Cita APA

Collier, P. 1., Hoeffler, A., & Söderbom, M. (2001). On the duration of civil war. Washington, DC: The World Bank.

Citación estilo Chicago

Collier, Paul 1949-, Anke Hoeffler, y Mans Söderbom. On the Duration of Civil War. Washington, DC: The World Bank, 2001.

Cita MLA

Collier, Paul 1949-, Anke Hoeffler, y Mans Söderbom. On the Duration of Civil War. Washington, DC: The World Bank, 2001.