Dyfyniad APA

Anderson, B. R. (1977). Professional Selling. Prentice-Hall.

Dyfyniad Arddull Chicago

Anderson, B. Robert. Professional Selling. New Jersey: Prentice-Hall, 1977.

Dyfyniad MLA

Anderson, B. Robert. Professional Selling. Prentice-Hall, 1977.

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