Cita APA (7a ed.)

Parkinson, P. (1991). Copper to 1995: Demand overcomes setbacks. The Economist Intelligence Unit.

Cita Chicago Style (17a ed.)

Parkinson, Peter. Copper to 1995: Demand Overcomes Setbacks. London: The Economist Intelligence Unit, 1991.

Cita MLA (9a ed.)

Parkinson, Peter. Copper to 1995: Demand Overcomes Setbacks. The Economist Intelligence Unit, 1991.