The New Book of Knowledge. Retrieved November 12, 2013, from Grolier Online http://nbk.grolier.com/ncpage?tn=/encyc/article.html&id=a2025050- h&type=0ta (Copper, 2013). Raphael (1483–1520). (2013). (S. J. Freedberg, Rev.).
"Wikia." Call of Duty Wiki. N.p., n.d. Web. 14 Nov. 2013. .
LiveScience.com. N.p., n.d. Web. 13 Nov. 2013. "The Cuneiform Writing System in Ancient Mesopotamia: Emergence and Evolution | EDSITEment."
"World Book Online." World Book. World Book, 2013. Web. 24 Oct. 2013.
Introduction to Alchemy. N.p., n.d. Web. 02 Dec. 2013. "What Is Alchemy."
Ubicomp 2012, pp. 749-751, Sep. 2012. [20] “context.” Online Etymology Dictionary (2013). [Online]. Available: http://www.etymonline.
Press | Yelp. [online] Available at: http://www.yelp.co.uk/press [Accessed: 18 Nov 2013].
Print. Went, Alex. “Character Analysis Banquo.” 2013 Houghton Mifflin Harcourt. Web. 10 November 2013. http://www.cliffsnotes.com.
Encyclopedia Britannica Inc., 2013. Web. 11 Nov. 2013 .
Westsidetoastmasters.com. 2013. Untitled. [online] Available at: http://westsidetoastmasters.com/resources/thinking_tools/ch16lev1sec1.html [Accessed: 22 Nov 2013].