Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

Collier, Paul. The Bottom Billion: Why the Poorest Countries Are Failing and What Can Be Done About It. Oxford ; New York: Oxford University Press, 2007.

Cita MLA (8th ed.)

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