- John Green. Paper Towns. New York: the Penguin Group, 2008.
- Walt Whitman. Leaves of Grass . --: Self, 1855.
- "Song of Myself, I, II, VI & LII." poets.org. 10/12/2015. <https://www.poets.org/poetsorg/poem/song-myself-i-ii-vi-lii>.
- John Koenig. "The Dictionary of Obscure Sorrows: Sonder." The Dictionary of Obscure Sorrows. 10/19/2015. <http://www.dictionaryofobscuresorrows.com/post/23536922667/sonder>.
- Benjamin Radford. "Human Lifespans Nearly Constant for 2,000 Years." livescience. August 21, 2009. 10/19/2015. <http://www.livescience.com/10569-human-lifespans-constant-2-000-years.html>.
Paper Towns
by John Green
Paper Towns Sources and ClassicNote Author
