Cita APA (7th ed.)

Arndt, R. A., & Roper, L. D. (1976). The metals and mineral fuels crisis: Facts and predictions. University Publications.

Cita Chicago (17th ed.)

Arndt, Richard A., i L. David Roper. The Metals and Mineral Fuels Crisis: Facts and Predictions. Blacksburg, Va.: University Publications, 1976.

Cita MLA (8th ed.)

Arndt, Richard A., i L. David Roper. The Metals and Mineral Fuels Crisis: Facts and Predictions. University Publications, 1976.