Dyfyniad APA

Goldstein, A. (1992). Secrets of overcoming sales resistance (7th ed.). Vikas.

Dyfyniad Arddull Chicago

Goldstein, Albert. Secrets of Overcoming Sales Resistance. 7th ed. New Delhi: Vikas, 1992.

Dyfyniad MLA

Goldstein, Albert. Secrets of Overcoming Sales Resistance. 7th ed. Vikas, 1992.

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