Cita APA

 Spurga, R. (2006).  Commodity fundamentals: How to trade the precious metals, energy, grain, and tropical commodity markets.  John Wiley & Sons.

Chicago Style Citation

 Spurga, Ronald.  Commodity Fundamentals: How to Trade the Precious Metals, Energy, Grain, and Tropical Commodity Markets.  John Wiley & Sons, 2006.

Cita MLA

 Spurga, Ronald.  Commodity Fundamentals: How to Trade the Precious Metals, Energy, Grain, and Tropical Commodity Markets.  John Wiley & Sons, 2006.