"Chapter 10: Making the Connection." Gale Encyclopedia of the Unusual and Unexplained. The Gale Group Inc. 2003. Encyclopedia.com. 23 Dec. 2009 <http://www.encyclopedia.com>.
"Chapter 10: Making the Connection." Gale Encyclopedia of the Unusual and Unexplained. The Gale Group Inc. 2003. Encyclopedia.com. (December 23, 2009). http://www.encyclopedia.com/doc/1G2-3406300241.html
"Chapter 10: Making the Connection." Gale Encyclopedia of the Unusual and Unexplained. The Gale Group Inc. 2003. Retrieved December 23, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1G2-3406300241.html