Books
Sovoboda, Elizabeth. What Makes a Hero? The Surprising Science of Selflessness. New York: Penguin, 2013. Print.
Web Pages
Greater Good: The Science of a Meaningful Life. University of California Berkley, n.d. Web. 21 Jan 2014. <https://greatergood.berkeley.edu/>.
Winkler, Matthew, perf. What Makes a Hero?. TED Talks, 2013. Film. 21 Jan 2014. <http://ed.ted.com/lessons/what-makes-a-hero-matthew-winkler>.
Gert, Bernard, "The Definition of Morality", The Stanford Encyclopedia of Philosophy (Fall 2012 Edition), Edward N. Zalta (ed.), URL = <http://plato.stanford.edu/archives/fall2012/entries/morality-definition/>.
Sovoboda, Elizabeth. What Makes a Hero? The Surprising Science of Selflessness. New York: Penguin, 2013. Print.
Web Pages
Greater Good: The Science of a Meaningful Life. University of California Berkley, n.d. Web. 21 Jan 2014. <https://greatergood.berkeley.edu/>.
Winkler, Matthew, perf. What Makes a Hero?. TED Talks, 2013. Film. 21 Jan 2014. <http://ed.ted.com/lessons/what-makes-a-hero-matthew-winkler>.
Gert, Bernard, "The Definition of Morality", The Stanford Encyclopedia of Philosophy (Fall 2012 Edition), Edward N. Zalta (ed.), URL = <http://plato.stanford.edu/archives/fall2012/entries/morality-definition/>.