Cita APA

Collier, P., & Paul Collier. (2007). The: Why the poorest countries are failing and what can be done about it. Oxford: Oxford University Press.

Chicago Style Citation

Collier, Paul, i Paul Collier. The: Why the Poorest Countries Are Failing and What Can Be Done About It. Oxford: Oxford University Press, 2007.

Cita MLA

Collier, Paul, i Paul Collier. The: Why the Poorest Countries Are Failing and What Can Be Done About It. Oxford: Oxford University Press, 2007.