Sherden, W. A. (1998). The fortune sellers: The big business of buying and selling predictions. John Wiley.
Cita Chicago (17th ed.)Sherden, William A. The Fortune Sellers: The Big Business of Buying and Selling Predictions. New York: John Wiley, 1998.
Cita MLA (8th ed.)Sherden, William A. The Fortune Sellers: The Big Business of Buying and Selling Predictions. John Wiley, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.