Weitz, B. A., Castleberry, S. B., & Tanner, J. F. (2004). Selling: Building partnerships (5th ed.). Boston: McGraw-Hill/Irwin.
Chicago Style aipamenaWeitz, Barton A., Stephen Bryon Castleberry, và John F. Tanner. Selling: Building Partnerships. 5th ed. Boston: McGraw-Hill/Irwin, 2004.
MLA aipamenaWeitz, Barton A., Stephen Bryon Castleberry, và John F. Tanner. Selling: Building Partnerships. 5th ed. Boston: McGraw-Hill/Irwin, 2004.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.