APA引文

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

Chicago Style (17th ed.) Citation

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

MLA引文

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