Jackson, D. W. (1988). Selling: The personal force in marketing. Wiley.
Cita Chicago (17th ed.)Jackson, Donald W. Selling: The Personal Force in Marketing. New York: Wiley, 1988.
Cita MLA (9th ed.)Jackson, Donald W. Selling: The Personal Force in Marketing. Wiley, 1988.
Atenció: Aquestes cites poden no estar 100% correctes.