Dyfyniad APA

Ingram, T. N. (2009). Professional selling: A trust-based approach (4th ed.). Cengage Learning Asia.

Dyfyniad Arddull Chicago

Ingram, Thomas N. Professional Selling: A Trust-based Approach. 4th ed. Pasig City: Cengage Learning Asia, 2009.

Dyfyniad MLA

Ingram, Thomas N. Professional Selling: A Trust-based Approach. 4th ed. Cengage Learning Asia, 2009.

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