Opt-in marketing : Increase sales exponentially with consessual marketing / Ernan Roman,Scott Hornstein.

by Roamn, Ernan
Published 2004

Voice of the customer marketing : a revolutionary five-step process to create customers who care, spend and stay / Ernan Roman.

by Roman, Ernan
Published 2011

Database marketing : know what your customer wants / Ian Linton.

by Linton, Ian
Published 1995

Direct hit : Direct marketing with a winning edge / Merlin Stone.

by Stone, Merlin
Published 1995