Sources

1. Shambhala Publications Present Feng-Shui: Feng Shui Fundamental www.shambhala.com/fengshui/fundamentals/whatis.cfm
   
2. Feng Shui-The Ancient Doctrine of Feng Shui http://chineseculture.about.com/library/weekly/aa041700a.htm
   
3. Yin and Yang
   www.168fengshui.com/Articles/Article_yinyang.htm
   
4. Feng Shui Gateway Qi
   www.fengshuigateway.com/principles.html
   
5. Feng Shui
   http://religiousmovements.lib.virginia.edu/nrms/fengshui.html
   
6. Feng Shui
   www.fengshui.co.uk/index.htm
   
7. Internet Feng Shui
   www.newmediastudies.com/fengshui.htm