1. On site: to opt-in or opt-out?
2. Boatright, John R. Ethics and the Conduct of Business, 3rded. Upper Saddle River, NJ: Prentice Hall, 2000.
3. Cisco Systems, Inc. Online Privacy Statement. Cisco Systems, Inc. 2003. 8 July 2004. .
4. Frye, Curtis D. Privacy-enhanced Business: Adapting to the Online Environment. Westport, CT: Quorum, 2001.
5. Harvey, James A., and Kimberly A. Verska. What the European Data Privacy Obligations Mean for U.S. Businesses. GigaLaw.com. 2001. 1 July 2004 .