8. References Route 21, (2007), Retrieved September 27, 2010 from:http://www.p21.org/route21/index.php?option=com_content&view=article&id=5&Itemid=2 Casey, B. (2010), Creating Clarity, Designing Memoragle Presentations. Retrieved on September 27, 2010 from http://www.youtube.com/watch?v=XJ1fmvLVij8