Dyfyniad APA
Weitz, B. A., Castleberry, S. B., & Tanner, J. F. (2004). Selling: Building partnerships (5th ed.). McGraw-Hill/Irwin.
Dyfyniad Arddull Chicago
Weitz, Barton A., Stephen B. Castleberry, and John F. Tanner. Selling: Building Partnerships. 5th ed. Boston: McGraw-Hill/Irwin, 2004.
Dyfyniad MLA
Weitz, Barton A., et al. Selling: Building Partnerships. 5th ed. McGraw-Hill/Irwin, 2004.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.