Cita APA (7th ed.)
Pederson, C. A., Wright, M. D., & Weitz, B. A. (1988). Selling, principles and methods (9th. ed.). Irwin.
Cita Chicago (17th ed.)
Pederson, Carlton A., Milburn D. Wright, i Barton A. Weitz. Selling, Principles and Methods. 9th. ed. Homewood, Il.: Irwin, 1988.
Cita MLA (9th ed.)
Pederson, Carlton A., et al. Selling, Principles and Methods. 9th. ed. Irwin, 1988.
Atenció: Aquestes cites poden no estar 100% correctes.