Dyfyniad APA

Collier, P., Hoeffler, A., & Söderbom, M. (2001). On the Duration of Civil War. World Bank.

Dyfyniad Arddull Chicago

Collier, P., A. Hoeffler, and M. Söderbom. On the Duration of Civil War. World Bank, 2001.

Dyfyniad MLA

Collier, P., et al. On the Duration of Civil War. World Bank, 2001.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.