Taken Quotes - Page 84
Bertrand Russell (2009). “Our Knowledge of the External World”, p.6, Routledge
Audrey Niffenegger (2009). “Her Fearful Symmetry: A Novel”, p.5, Simon and Schuster
Arlene J. Chai (2011). “Eating Fire and Drinking Water”, p.419, Ballantine Books
"Billions and Billions". Book by Carl Sagan, epilogue, p. 271, 1997.
Ann Aguirre (2008). “Grimspace”, p.237, Penguin