Dyfyniad APA

Roth, C. (1960). The treasuray of sure fire selling. Prentice hall.

Dyfyniad Arddull Chicago

Roth, Charles.B. The Treasuray of Sure Fire Selling. New Jersey: Prentice hall, 1960.

Dyfyniad MLA

Roth, Charles.B. The Treasuray of Sure Fire Selling. Prentice hall, 1960.

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