Lastufka, Alan. "John Green's Biography." Web. 3 June 2015. .
"John Green (Author)." Wikipedia. Web. 7 June 2015. .
Green, John. Paper Towns. Penguin Group (USA), 2008. 305. Print.
"John Green (Author)." Wikipedia. Web. 7 June 2015. .
Green, John. Paper Towns. Penguin Group (USA), 2008. 305. Print.