Works Cited

Crane, John, and Jette Hannibal. Psychology: course companion. Oxford: Oxford University Press, 2009. Print.

Hannibal, Jette. Psychology for the IB diploma. Oxford: Oxford University Press, 2012. Print.

“Jean Piaget.” Simply Psychology. N.p., n.d. Web. 8 Dec. 2013. < http://www.simplypsychology.org/piaget.html >.

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