Purcell, W. D. (1999). Agricultural futures and options: Principles and strategies. Upper Saddle River, N.J: Prentice Hall.
Παραπομπή Chicago StylePurcell, Wayne D. Agricultural Futures and Options: Principles and Strategies. Upper Saddle River, N.J: Prentice Hall, 1999.
Παραπομπή MLAPurcell, Wayne D. Agricultural Futures and Options: Principles and Strategies. Upper Saddle River, N.J: Prentice Hall, 1999.
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