Dyfyniad APA

Aspley, J. C., & Ovid Riso. (1966). Dartnell sales promotion handbook/5e (5th ed.). The Dartnell Corporation.

Dyfyniad Arddull Chicago

Aspley, John Cameron, and Ovid Riso. Dartnell Sales Promotion Handbook/5e. 5th ed. Chicago: The Dartnell Corporation, 1966.

Dyfyniad MLA

Aspley, John Cameron, and Ovid Riso. Dartnell Sales Promotion Handbook/5e. 5th ed. The Dartnell Corporation, 1966.

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