Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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

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