APA
Purcell W. D., Koontz S. R., . (1999). Agricultural futures and options: Principles and strategies. New Jersey: Prentice Hall.
Chicago
Purcell Wayne D, Koontz Stephen R, . 1999. Agricultural futures and options: Principles and strategies. New Jersey: Prentice Hall.
Harvard
Purcell W. D., Koontz S. R., . (1999). Agricultural futures and options: Principles and strategies. New Jersey: Prentice Hall.
MLA
Purcell Wayne D, Koontz Stephen R, . Agricultural futures and options: Principles and strategies. New Jersey: Prentice Hall. 1999.