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Dryden, John. "Romulus". The Internet Classics Archive. 2009. Web. 10 Dec. 2013. <http://classics.mit.edu/Plutarch/romulus.html>.
Greekgeek. The Meaning of "Expecto Patronum": From Hogwarts to Ancient Rome. Hub Pages. Web. 10 Dec. 2013. <http://greekgeek.hubpages.com/hub/expecto-patronum-meaning>.
"Griffin". Merriam-Webster. 2013. Web. 12 Dec. 2013. <http://www.merriam-webster.com/dictionary/griffin>.
"Hippogriff". Merriam-Webster. 2013. Web. 12 Dec. 2013. <http://www.merriam-webster.com/dictionary/lupine>.
Interview with J.K. Rowling. Scholastic, 2000. Web. 12 Dec. 2013.
"JK Rowling's World Book Day Chat". Accio Quote. 2004. Web. 12 Dec. 2013. <http://www.accio-quote.org/articles/2004/0304-wbd.htm>.
Kirsch, Johann P. "St. Hedwig". The Catholic Encyclopedia. Web. 12 Dec. 2013. <http://www.newadvent.org/cathen/07189a.htm>.
"Lupine". Merriam-Webster. 2013. Web. 12 Dec. 2013. <http://www.merriam-webster.com/dictionary/lupine>.
Lydon, Christopher. Interview with J.K. Rowling. The Connection. WBUR Radio, 1999. Broadcast.
"Minerva". Encyclopedia Mythica. Encyclopedia Mythica Online, 2013. Web. 10 Dec. 2013. <http://www.pantheon.org/articles/m/minerva.html>.
Rowling, J.K. Harry Potter and the Prisoner of Azkaban. New York: Scholastic, 1999.
"Sirius is Dog Star and Brightest Star". EarthSky. 2012. Web. 12 Dec. 2013. <http://earthsky.org/brightest-stars/sirius-the-brightest-star>.
"What Jo Says About... Albus Dumbledore". Accio Quote. Web. 12 Dec. 2013. <http://www.accio-quote.org/themes/dumbledore.htm>.