Johnston, M. W., Churchill, G. A., Ford, N. M., Walker, O. C., & Marshall, G. W. (2006). Churchill/Ford/Walker's sales force management (8th ed.). McGraw-Hill/Irwin.
Cita Chicago (17th ed.)Johnston, Mark W., Gilbert A. Churchill, Neil M. Ford, Orville C. Walker, i Greg W. Marshall. Churchill/Ford/Walker's Sales Force Management. 8th ed. New York, N.Y: McGraw-Hill/Irwin, 2006.
Cita MLA (9th ed.)Johnston, Mark W., et al. Churchill/Ford/Walker's Sales Force Management. 8th ed. McGraw-Hill/Irwin, 2006.
Atenció: Aquestes cites poden no estar 100% correctes.