1. Answers.com. American heritage dictionary. www.answers.com/topic/surgery . Accessed 3 July 2011
2. My etymology. http://www.myetymology.com/english/surgery.html . Accessed 3 July 2011
3. Arnott R, Finger S, Smith CUM (eds) (2003) Trepanation. History, discovery, theory. Swets & Zeitlenger, Abingdon
4. Hippocrates. On injuries of the head. (Trans: Francis Adams) 2007 eBooks@Adelaide http://ebooks.adelaide.edu.au/h/hippocrates/head/
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