Mark Brownlow, “Email Promotions vs Newsletters,” Email Marketing Reports, http://www.email-marketing-reports.com/newsletterspromotions.htm (accessed March 18, 2008).
Spencer Kollas, “2 Email Strategies Most Marketers Forget,” iMedia Connection, February 18, 2008, http://www.imediaconnection.com/content/18346.asp (accessed March 18, 2008).
Véro S. Pepperrell, “The Seven Deadly Sins of Email Marketing Management,” Digital Web Magazine, March 27, 2007, http://www.digital-web.com/articles/seven_sins_of_email_marketing (accessed March 18, 2008).
Brad Templeton, “Origin of the Term ‘Spam’ to Mean Net Abuse,” Brad Templeton's Home Page, http://www.templetons.com/brad/spamterm.html (accessed March 18, 2008).