STONE, B. (1994). Successful Direct Marketing Methods Bob Stone. NTC Business Books.
Dyfyniad Arddull ChicagoSTONE, Bob. Successful Direct Marketing Methods Bob Stone. NTC Business Books, 1994.
Dyfyniad MLASTONE, Bob. Successful Direct Marketing Methods Bob Stone. NTC Business Books, 1994.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.