1United States Census Bureau.QUARTERLY RETAIL E-COMMERCE SALES 4th QUARTER 2006[OB]. http://www.census.gov/mrts/www/data/html/06Q4.html .
2The European Commission’s Directorate General for Enter-prise and Industry.The Europeane-Business Report2006/07 edition[OB]. http://www.ebusiness-watch.org/re-sources/synthesis.htm .
3Lisa Phillips.B2B Marketing Online:Trends and Tactics[OB][]..