Dyfyniad APA

Anderson, B. R. (1981). Professional selling/2e (2nd ed.). Prentice Hall.

Dyfyniad Arddull Chicago

Anderson, B. Robert. Professional Selling/2e. 2nd ed. New Jersey: Prentice Hall, 1981.

Dyfyniad MLA

Anderson, B. Robert. Professional Selling/2e. 2nd ed. Prentice Hall, 1981.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.