Spurga, R. (2006). Commodity fundamentals: How to trade the precious metals, energy, grain, and tropical commodity markets. John Wiley & Sons.
استشهاد بنمط شيكاغوSpurga, Ronald. Commodity Fundamentals: How to Trade the Precious Metals, Energy, Grain, and Tropical Commodity Markets. John Wiley & Sons, 2006.
MLA استشهادSpurga, Ronald. Commodity Fundamentals: How to Trade the Precious Metals, Energy, Grain, and Tropical Commodity Markets. John Wiley & Sons, 2006.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.