4Berthon.P.E.Pitt.L.Watson.R.T.The World Wide Web as an advertising medium:toward an understanding of conversion efficiency.Journal of Advertising,1996.
5Dreze,Z,Zufryden,F.Is internet advertising re ady for prime time.Journal of Advertising,1998.
6Lee jaewon.Internet advertising strategy by co mparison challenge approach.Preceeding of the ACM conference on electronic commerce,2003.